Marine Life: Most Popular Articles
These articles are the most popular over the last month.
Starfish Facts
Starfish - sea stars - are marine invertebrates that are a variety of colors, shapes and sizes, although all resemble a star. Starfish are familiar marine animals and fascinating creatures. Here are 10 facts about starfish, including one about how they are not actually a fish.
Starfish - sea stars - are marine invertebrates that are a variety of colors, shapes and sizes, although all resemble a star. Starfish are familiar marine animals and fascinating creatures. Here are 10 facts about starfish, including one about how they are not actually a fish.
Sea Turtles
Sea turtles are reptiles that live in a marine or brackish environment. Learn about sea turtle reproduction, distribution, classification and conservation status.
Sea turtles are reptiles that live in a marine or brackish environment. Learn about sea turtle reproduction, distribution, classification and conservation status.
What is the Biggest Fish?
The whale shark is the world's biggest fish, maxing out at about 65 feet in length and weighing up to about 75,000 pounds.
The whale shark is the world's biggest fish, maxing out at about 65 feet in length and weighing up to about 75,000 pounds.
Biggest Shark Species
The whale shark is the world's biggest shark species. Growing to a length of about 65 feet and weighing about 75,000 pounds, this streamlined fish is really a gentle giant.
The whale shark is the world's biggest shark species. Growing to a length of about 65 feet and weighing about 75,000 pounds, this streamlined fish is really a gentle giant.
Intertidal Zone
The intertidal zone is the area where land and sea meet, and often includes tide pools. Learn about the unique intertidal zone, tide pools, the types of marine life that live in the intertidal and threats to this habitat.
The intertidal zone is the area where land and sea meet, and often includes tide pools. Learn about the unique intertidal zone, tide pools, the types of marine life that live in the intertidal and threats to this habitat.
10 Facts About Sharks
There are several hundred species of sharks, ranging in size from less than ten inches to over 50 feet. Learn shark facts about these amazing fish with a fierce reputation, but fascinating biology.
There are several hundred species of sharks, ranging in size from less than ten inches to over 50 feet. Learn shark facts about these amazing fish with a fierce reputation, but fascinating biology.
10 Facts About Whales
Cetaceans - whales, dolphins and porpoises - are a diverse group of animals ranging in size from just a few feet long to over 100 feet long. While most whales spend their lives offshore in the ocean's pelagic zone, some inhabit coastal areas and even spend part of their lives in fresh water. Learn about how whales feed, reproduce and explore their world.
Cetaceans - whales, dolphins and porpoises - are a diverse group of animals ranging in size from just a few feet long to over 100 feet long. While most whales spend their lives offshore in the ocean's pelagic zone, some inhabit coastal areas and even spend part of their lives in fresh water. Learn about how whales feed, reproduce and explore their world.
Major Marine Habitats
Within the oceans, there are many different types of habitat, or environments in which plants and animals live, ranging from freezing polar ice to tropical coral reefs. These habitats all come with their unique challenges and are inhabited by a wide variety of organisms. Learn more about important marine life habitats including mangroves, the intertidal zone and tide pools, coral reefs, seagrasses, the open ocean - pelagic zone, the deep sea and hydrothermal vents.
Within the oceans, there are many different types of habitat, or environments in which plants and animals live, ranging from freezing polar ice to tropical coral reefs. These habitats all come with their unique challenges and are inhabited by a wide variety of organisms. Learn more about important marine life habitats including mangroves, the intertidal zone and tide pools, coral reefs, seagrasses, the open ocean - pelagic zone, the deep sea and hydrothermal vents.
Protist
Protists are organisms in the kingdom Protista. These organisms are eukaryotes, meaning they are made up of single or multiple cells which all contain a nucleus enclosed by a membrane.
Protists are organisms in the kingdom Protista. These organisms are eukaryotes, meaning they are made up of single or multiple cells which all contain a nucleus enclosed by a membrane.
Open Ocean - Pelagic Zone
The open ocean, or pelagic zone, is the area of the ocean outside of coastal areas, and where you’ll find some of the biggest marine life species, including whales, bluefin tuna, and giant squid.
The open ocean, or pelagic zone, is the area of the ocean outside of coastal areas, and where you’ll find some of the biggest marine life species, including whales, bluefin tuna, and giant squid.
Characteristics of Marine Life
There are thousands of species of marine life, from tiny zooplankton to enormous whales. Each is adapted to the specific habitat it occupies. Throughout the oceans, marine organisms must deal with several things that terrestrial life do not, including regulation of salt, obtaining oxygen, and adapting to water pressure. Learn about ways marine organisms survive in the oceans.
There are thousands of species of marine life, from tiny zooplankton to enormous whales. Each is adapted to the specific habitat it occupies. Throughout the oceans, marine organisms must deal with several things that terrestrial life do not, including regulation of salt, obtaining oxygen, and adapting to water pressure. Learn about ways marine organisms survive in the oceans.
Biggest Ocean Animal
The biggest animal in the ocean, and in the world, is the blue whale (Balaenoptera musculus), a sleek, light-colored giant. The blue whale gets its name from its skin, which is a mottled blue-gray color.
The biggest animal in the ocean, and in the world, is the blue whale (Balaenoptera musculus), a sleek, light-colored giant. The blue whale gets its name from its skin, which is a mottled blue-gray color.
Marine Biology
Marine biology is the scientific study of plants and animals that live in salt water. When many people think about a marine biologist, they picture a dolphin trainer. But marine biology is so much more. Learn about the field of marine biology, a marine biologist's tools and the importance of studying the oceans and their marine life and habitats.
Marine biology is the scientific study of plants and animals that live in salt water. When many people think about a marine biologist, they picture a dolphin trainer. But marine biology is so much more. Learn about the field of marine biology, a marine biologist's tools and the importance of studying the oceans and their marine life and habitats.
7 Species of Tuna
Tunas are large, powerful fish that are distributed worldwide from tropical to temperate oceans. They are members of the family Scombridae, which includes both tunas and mackerels. Learn about the several species of fish known as tuna, and their importance commercially and as gamefish.
Tunas are large, powerful fish that are distributed worldwide from tropical to temperate oceans. They are members of the family Scombridae, which includes both tunas and mackerels. Learn about the several species of fish known as tuna, and their importance commercially and as gamefish.
Types of Algae
Marine algae, more commonly known as seaweeds, come in all shapes and sizes. Here is an introduction to brown, red and green algae with some examples of each type of seaweed.
Marine algae, more commonly known as seaweeds, come in all shapes and sizes. Here is an introduction to brown, red and green algae with some examples of each type of seaweed.
Coral Reefs
Learn about coral reefs. Coral reefs are a center for biodiversity and an important marine habitat. Tropical corals, cold-water corals, the marine life species that inhabit them and the natural and human threats to coral reefs in the oceans are discussed here.
Learn about coral reefs. Coral reefs are a center for biodiversity and an important marine habitat. Tropical corals, cold-water corals, the marine life species that inhabit them and the natural and human threats to coral reefs in the oceans are discussed here.
Adaptation
An adaptation is a physical or behavioral characteristic that has developed to allow an organism to better survive in its environment.
An adaptation is a physical or behavioral characteristic that has developed to allow an organism to better survive in its environment.
Corals and Coral Reefs Roundup
Coral reefs provide some of the most spectacular underwater scenery, and marine life biodiversity in the world. Here you can learn about coral, how coral reefs form, and threats to coral reefs such as coral bleaching and ocean acidification.
Coral reefs provide some of the most spectacular underwater scenery, and marine life biodiversity in the world. Here you can learn about coral, how coral reefs form, and threats to coral reefs such as coral bleaching and ocean acidification.
Northern Sea Star (Asterias vulgaris)
Northern Sea Star (Asterias vulgaris) Picture
Northern Sea Star (Asterias vulgaris) Picture
Whale Shark
While its name may be deceiving, the whale shark is actually a shark, and the largest fish in the world. Whale sharks can grow to 65 feet in length and up to about 75,000 pounds in weight. Females are generally larger than males
While its name may be deceiving, the whale shark is actually a shark, and the largest fish in the world. Whale sharks can grow to 65 feet in length and up to about 75,000 pounds in weight. Females are generally larger than males
Get a Marine Internship
Getting a marine biology internship is a crucial step in your path to becoming a marine biologist. Here are some tips and tricks that will help you get a marine biology internship at the organization of your choice. From applying for the internship and interviewing, to following-up with your interviewer, following these steps will help you get a marine biology internship.
Getting a marine biology internship is a crucial step in your path to becoming a marine biologist. Here are some tips and tricks that will help you get a marine biology internship at the organization of your choice. From applying for the internship and interviewing, to following-up with your interviewer, following these steps will help you get a marine biology internship.
Red Algae
Red algae are, not surprisingly, red, purplish or reddish in color. There are about 6,000 species of red algae and they are classified as protists in the phylum Rhodophyta. Red algae species range from simple one-celled organisms to complex, plant-like organisms.
Red algae are, not surprisingly, red, purplish or reddish in color. There are about 6,000 species of red algae and they are classified as protists in the phylum Rhodophyta. Red algae species range from simple one-celled organisms to complex, plant-like organisms.
Humpback Whale Poop
Photo of whale poop after a humpback whale was feeding on krill.
Photo of whale poop after a humpback whale was feeding on krill.
How Do Sharks Sleep
Sharks need to keep water moving over their gills so that they receive oxygen. So that seems to mean that they need to keep moving all the time...or do they? How do sharks sleep? Even though sharks need to keep water moving over their gills to receive oxygen, some sharks need to keep moving to do this, while others don't. Either way, sharks, like other marine animals, don't seem to fall in a deep sleep like we do.
Sharks need to keep water moving over their gills so that they receive oxygen. So that seems to mean that they need to keep moving all the time...or do they? How do sharks sleep? Even though sharks need to keep water moving over their gills to receive oxygen, some sharks need to keep moving to do this, while others don't. Either way, sharks, like other marine animals, don't seem to fall in a deep sleep like we do.
Sea Stars - Starfish
Sea stars, or starfish, are star-shaped animals that are a variety of shapes, sizes and colors. You might be most familiar with sea stars that live in tide pools in the intertidal zone, but some sea stars live in deep water. Learn about sea star classification, reproduction and feeding here.
Sea stars, or starfish, are star-shaped animals that are a variety of shapes, sizes and colors. You might be most familiar with sea stars that live in tide pools in the intertidal zone, but some sea stars live in deep water. Learn about sea star classification, reproduction and feeding here.
Brown Algae
Brown algae is the largest, most complex type of algae. This type of marine algae is brown, olive or yellowish-brown in color. Brown algae contains contains chlorophyll a and c and a pigment called fucoxanthin, which gives it its color. Types of algae include kelp, rockweeds and wracks in the genus Fucus and free-floating algae in the genus Sargassum.
Brown algae is the largest, most complex type of algae. This type of marine algae is brown, olive or yellowish-brown in color. Brown algae contains contains chlorophyll a and c and a pigment called fucoxanthin, which gives it its color. Types of algae include kelp, rockweeds and wracks in the genus Fucus and free-floating algae in the genus Sargassum.
Great White Shark
The white shark, commonly called the great white shark, is one of the most iconic and feared predators of the ocean. With its razor-sharp teeth and menacing appearance, it certainly looks dangerous. But the more we learn about this creature, the more we learn they are not indiscriminate predators, and definitely don't prefer humans as prey. Learn here about the great white shark, its biology, feeding, reproduction and distribution.
The white shark, commonly called the great white shark, is one of the most iconic and feared predators of the ocean. With its razor-sharp teeth and menacing appearance, it certainly looks dangerous. But the more we learn about this creature, the more we learn they are not indiscriminate predators, and definitely don't prefer humans as prey. Learn here about the great white shark, its biology, feeding, reproduction and distribution.
Do Whales Have Hair
Whales are mammals, and one of the characteristics common to all mammals is the presence of hair. There are over 80 species of whales, and hair is only visible in some. Whales have hair on their heads as fetuses, but they don't always keep it.
Whales are mammals, and one of the characteristics common to all mammals is the presence of hair. There are over 80 species of whales, and hair is only visible in some. Whales have hair on their heads as fetuses, but they don't always keep it.
Baleen
Baleen is a strong, yet flexible material made out of keratin, a protein that is the same material that makes up our hair and fingernails.
Baleen is a strong, yet flexible material made out of keratin, a protein that is the same material that makes up our hair and fingernails.
10 Facts About Seals
Seals are divided into two families, the Phocidae, the earless or ‘true’ seals (e.g., harbor or common seals), and the Otariidae, the eared seals (e.g., fur seals and sea lions). This article contains facts about both types of seals.
Seals are divided into two families, the Phocidae, the earless or ‘true’ seals (e.g., harbor or common seals), and the Otariidae, the eared seals (e.g., fur seals and sea lions). This article contains facts about both types of seals.
Sea Turtle Species
Sea turtles are classified in the Class Reptilia, Subclass Anapsida and Order Chelonii. There are seven recognized species of sea turtles, six of which (the hawksbill, green, flatback, loggerhead, Kemp's ridley and olive ridley turtles) are in the Family Cheloniidae, with only one (the leatherback) in the Family Dermochelyidae. All seven species of sea turtles are listed under the Endangered Species Act.
Sea turtles are classified in the Class Reptilia, Subclass Anapsida and Order Chelonii. There are seven recognized species of sea turtles, six of which (the hawksbill, green, flatback, loggerhead, Kemp's ridley and olive ridley turtles) are in the Family Cheloniidae, with only one (the leatherback) in the Family Dermochelyidae. All seven species of sea turtles are listed under the Endangered Species Act.
9 Facts About Lobsters
When you think of lobster, do you think of a bright red crustacean on your dinner plate, or a territorial creature roaming caves in the ocean? Despite their fame as a delicacy, lobsters also have fascinating lives. Learn some lobster facts about this iconic marine creature here.
When you think of lobster, do you think of a bright red crustacean on your dinner plate, or a territorial creature roaming caves in the ocean? Despite their fame as a delicacy, lobsters also have fascinating lives. Learn some lobster facts about this iconic marine creature here.
Mangroves
The term “mangrove” is used to refer to a habitat comprised of a number of halophytic (salt-tolerant) plant species, of which there are more than 12 families and 50 species worldwide. Mangrove are found along tropical and sub-tropical coastlines in Africa, Australia, Asia and North and South America. Mangrove plants have a tangle of roots which are often exposed above water, leading to the nickname “walking trees.”
The term “mangrove” is used to refer to a habitat comprised of a number of halophytic (salt-tolerant) plant species, of which there are more than 12 families and 50 species worldwide. Mangrove are found along tropical and sub-tropical coastlines in Africa, Australia, Asia and North and South America. Mangrove plants have a tangle of roots which are often exposed above water, leading to the nickname “walking trees.”
Who's Hiding in the Tide Pool
Figure out who's hiding in this tide pool photo.
Figure out who's hiding in this tide pool photo.
The Deep Sea
The deep sea includes the deepest, darkest, coldest parts of the ocean. Eighty percent of the ocean consists of waters in the deep sea greater than 1,000 meters in depth. Parts of the deep sea described here are also included in the pelagic zone, but these deep sea areas in the deepest parts of the ocean have their own special characteristics. Most deep sea areas are cold, dark, and inhospitable to us humans, but support a surprising number of species that thrive in this deep sea environment.
The deep sea includes the deepest, darkest, coldest parts of the ocean. Eighty percent of the ocean consists of waters in the deep sea greater than 1,000 meters in depth. Parts of the deep sea described here are also included in the pelagic zone, but these deep sea areas in the deepest parts of the ocean have their own special characteristics. Most deep sea areas are cold, dark, and inhospitable to us humans, but support a surprising number of species that thrive in this deep sea environment.
Echinoderms
Echinoderms, or members of the Phylum Echinodermata, are some of the most easily-recognized marine invertebrates, many of which are found in tide pools or in the touch tank at your local aquarium. The Phylum Echinodermata includes 4 classes: Stelleroidea (sea stars), Echinoidea (sea urchins and sand dollars), Holothuroidea (sea cucumbers) and Crinoidea (sea lilies and feather stars.) They are a diverse group of organisms, containing about 6,000 species.
Echinoderms, or members of the Phylum Echinodermata, are some of the most easily-recognized marine invertebrates, many of which are found in tide pools or in the touch tank at your local aquarium. The Phylum Echinodermata includes 4 classes: Stelleroidea (sea stars), Echinoidea (sea urchins and sand dollars), Holothuroidea (sea cucumbers) and Crinoidea (sea lilies and feather stars.) They are a diverse group of organisms, containing about 6,000 species.
Leatherback Sea Turtle (Dermochelys coriacea) Picture
Leatherback Sea Turtle Picture
Leatherback Sea Turtle Picture
Whale, Dolphin or Porpoise?
Is it a whale, dolphin or porpoise? These terms are often used interchangeably, but there is a difference. Learn about the terms whale, dolphin and porpoise and how they are used to describe different members of the order Cetacea.
Is it a whale, dolphin or porpoise? These terms are often used interchangeably, but there is a difference. Learn about the terms whale, dolphin and porpoise and how they are used to describe different members of the order Cetacea.
Seagrasses
Seagrass is an angiosperm (flowering plant) that lives an a marine or brackish environment. There are about 50 species of true seagrasses worldwide and they are found within the plant families Posidoniaceae, Zosteraceae, Hydrocharitaceae, and Cymodoceaceae. Seagrasses require lots of light, so the depths at which they occur in the ocean are limited by the availability of light. Seagrasses are found in protected coastal waters such as bays and lagoons.
Seagrass is an angiosperm (flowering plant) that lives an a marine or brackish environment. There are about 50 species of true seagrasses worldwide and they are found within the plant families Posidoniaceae, Zosteraceae, Hydrocharitaceae, and Cymodoceaceae. Seagrasses require lots of light, so the depths at which they occur in the ocean are limited by the availability of light. Seagrasses are found in protected coastal waters such as bays and lagoons.
Loggerhead Sea Turtle (Caretta caretta)
Loggerhead sea turtles are a reddish-brown turtle that have a very large head. They are the most common turtle that nests in Florida.
Loggerhead sea turtles are a reddish-brown turtle that have a very large head. They are the most common turtle that nests in Florida.
Types of Cetaceans
There are about 86 species of cetaceans - whales, dolphins and porpoises in the Order Cetacea, which is further divided into two sub-orders, the Odontocetes and the Mysticetes. Cetaceans can differ greatly in their appearance, distribution, and behavior. Learn about and see photos of featured cetacean species.
There are about 86 species of cetaceans - whales, dolphins and porpoises in the Order Cetacea, which is further divided into two sub-orders, the Odontocetes and the Mysticetes. Cetaceans can differ greatly in their appearance, distribution, and behavior. Learn about and see photos of featured cetacean species.
Cetaceans
Cetacean is a word used to describe all whales, dolphins and porpoises in the order Cetacea. Learn about the characteristics of cetaceans, including baleen whales and toothed whales and how they survive in the oceans.
Cetacean is a word used to describe all whales, dolphins and porpoises in the order Cetacea. Learn about the characteristics of cetaceans, including baleen whales and toothed whales and how they survive in the oceans.
Whaling
Whaling ended in the U.S. for the most part by the early 1900s, so some are surprised to find out it still occurs in the world. The International Whaling Commission (IWC) put a pause in whaling, or a moratorium, in place in 1982, and it became effective in 1985-86. If a country wants to hunt whales these days, there are three ways it can do so.
Whaling ended in the U.S. for the most part by the early 1900s, so some are surprised to find out it still occurs in the world. The International Whaling Commission (IWC) put a pause in whaling, or a moratorium, in place in 1982, and it became effective in 1985-86. If a country wants to hunt whales these days, there are three ways it can do so.
Shark Finning
Shark finning is the process of cutting a fin off a shark. The rest of the shark's body is cast into the sea, sometimes still alive. Even though the fins do not have any taste, they are a sought-after commodity for shark fin soup, which is a delicacy in Asian cultures and a dish served at special occasions.
Shark finning is the process of cutting a fin off a shark. The rest of the shark's body is cast into the sea, sometimes still alive. Even though the fins do not have any taste, they are a sought-after commodity for shark fin soup, which is a delicacy in Asian cultures and a dish served at special occasions.
Right Whale (Eubalaena Glacialis) Poop
Image of right whale (Eubalaena glacialis) poop
Image of right whale (Eubalaena glacialis) poop
Hawksbill Sea Turtle (Eretmochelys imbricata)
Hawksbill turtles were named for the shape of their beak, which looks similar to the beak of a raptor. These turtles have a beautiful tortoiseshell pattern on their carapace, and were hunted nearly to extinction for their shells.
Hawksbill turtles were named for the shape of their beak, which looks similar to the beak of a raptor. These turtles have a beautiful tortoiseshell pattern on their carapace, and were hunted nearly to extinction for their shells.
Green Algae
Green algae range from simple, one-celled organisms to complex, multi-celled organisms. They may also live in large colonies. There are both marine and freshwater green algae species, although we will focus on the marine species here.
Green algae range from simple, one-celled organisms to complex, multi-celled organisms. They may also live in large colonies. There are both marine and freshwater green algae species, although we will focus on the marine species here.
Ways to Protect Marine Life
All of our actions, no matter where we live, effect the ocean and the marine life it holds. Even if you live far inland, there are many things you can do that will help marine life. Learn about easy ways that you can help protect marine life, including recycling fishing line, eating sustainable seafood and reducing your carbon footprint.
All of our actions, no matter where we live, effect the ocean and the marine life it holds. Even if you live far inland, there are many things you can do that will help marine life. Learn about easy ways that you can help protect marine life, including recycling fishing line, eating sustainable seafood and reducing your carbon footprint.
Basking Shark
The basking shark is the second-largest shark species, and can reach lengths up to 30-40 feet and weights up to about 8,000 pounds. They are filter-feeders who are often seen feeding near the surface with their huge mouths agape.
The basking shark is the second-largest shark species, and can reach lengths up to 30-40 feet and weights up to about 8,000 pounds. They are filter-feeders who are often seen feeding near the surface with their huge mouths agape.
Nekton
Nekton is the term that refers to the "swimmers," the animals in the ocean that can move independently of ocean currents, by swimming or using another form of locomotion. This means that, unlike plankton, they are capable of determining their location in the ocean.
Nekton is the term that refers to the "swimmers," the animals in the ocean that can move independently of ocean currents, by swimming or using another form of locomotion. This means that, unlike plankton, they are capable of determining their location in the ocean.
Human Uses For Algae
Marine algae, commonly called seaweeds, is important for food and shelter in the ocean. There are also a myriad of human uses for algae, which include food, medicinal and agricultural. Learn more about the plants in the ocean her
Marine algae, commonly called seaweeds, is important for food and shelter in the ocean. There are also a myriad of human uses for algae, which include food, medicinal and agricultural. Learn more about the plants in the ocean her
Ovoviviparous
Ovoviviparous animals produce eggs, but instead of laying the eggs, the eggs develop within the mother's body.
Ovoviviparous animals produce eggs, but instead of laying the eggs, the eggs develop within the mother's body.
Common Periwinkle (Littorina littorea)
Common Periwinkle (Littorina littorea) Picture
Common Periwinkle (Littorina littorea) Picture
Byssal (Byssus) Threads
Byssal, or byssus threads are strong, silky fibers made from proteins that are used by mussels to attach to rocks, pilings, or other substrates.
Byssal, or byssus threads are strong, silky fibers made from proteins that are used by mussels to attach to rocks, pilings, or other substrates.
Overfishing
Overfishing is, simply put, when so many fish are caught that the population can't reproduce enough to replace them. Overfishing can lead to depletion of or extinction of fish populations.
Overfishing is, simply put, when so many fish are caught that the population can't reproduce enough to replace them. Overfishing can lead to depletion of or extinction of fish populations.
Harp Seal
Harp seals are ice-loving pinnipeds that live in the Arctic and North Atlantic oceans. Harp seals are fuzzy white when born, but their coat gradually changes as they mature, turning into a silvery gray with a darker harp-shaped pattern on the adult's back and sides. Due to controversial seal hunts, harp seals are often in the news.
Harp seals are ice-loving pinnipeds that live in the Arctic and North Atlantic oceans. Harp seals are fuzzy white when born, but their coat gradually changes as they mature, turning into a silvery gray with a darker harp-shaped pattern on the adult's back and sides. Due to controversial seal hunts, harp seals are often in the news.
Turtle Excluder Device (TED)
Sea turtles are reptiles that live in a marine or brackish environment. The flippers of sea turtles are long and paddle-like, making them excellent for swimming but poor for walking on land. There are seven species of sea turtles, several of which inhabit U.S. waters. View images of sea turtles here.
Sea turtles are reptiles that live in a marine or brackish environment. The flippers of sea turtles are long and paddle-like, making them excellent for swimming but poor for walking on land. There are seven species of sea turtles, several of which inhabit U.S. waters. View images of sea turtles here.
Baleen vs. Toothed Whales
There are over 80 recognized species of whales, dolphins and porpoises, or cetaceans, and these species are divided into two main groups: the baleen whales and the toothed whales. While they are all considered whales, there are some important differences between the baleen whales and toothed whales.
There are over 80 recognized species of whales, dolphins and porpoises, or cetaceans, and these species are divided into two main groups: the baleen whales and the toothed whales. While they are all considered whales, there are some important differences between the baleen whales and toothed whales.
Hydrothermal Vents
Hydrothermal vents, located in the deep sea, were discovered relatively recently. It was only about 30 years ago that scientists in the submersible Alvin discovered these undersea "geysers."
Hydrothermal vents, located in the deep sea, were discovered relatively recently. It was only about 30 years ago that scientists in the submersible Alvin discovered these undersea "geysers."
Marine Conservation
Marine conservation is the protection of marine species and ecosystems in oceans and seas worldwide. It involves protection and restoration of species, populations and habitats and mitigating human activities such as overfishing, habitat destruction, pollution, whaling and other issues that effect marine life and marine habitats.
Marine conservation is the protection of marine species and ecosystems in oceans and seas worldwide. It involves protection and restoration of species, populations and habitats and mitigating human activities such as overfishing, habitat destruction, pollution, whaling and other issues that effect marine life and marine habitats.
Cartilage
Cartilage is a tough, flexible tissue, which is softer than bone.
Cartilage is a tough, flexible tissue, which is softer than bone.
Florida Manatees Nuzzling
Manatees Nuzzling
Manatees Nuzzling
Seals and Sea Lions
Seals, sea lions and walruses are all in the order Carnivora and suborder Pinnipedia, thus they are called “pinnipeds.” There are three families of pinnipeds, the Phocidae, or earless or ‘true’ seals; the Otariidae, the eared seals, and the Odobenidae, the walrus. This article focuses on the difference between the earless seals (seals) and the eared seals (sea lions and fur seals).
Seals, sea lions and walruses are all in the order Carnivora and suborder Pinnipedia, thus they are called “pinnipeds.” There are three families of pinnipeds, the Phocidae, or earless or ‘true’ seals; the Otariidae, the eared seals, and the Odobenidae, the walrus. This article focuses on the difference between the earless seals (seals) and the eared seals (sea lions and fur seals).
Green Sea Turtle (Chelonia mydas) Hatchling
Green sea turtle hatchling picture. The green turtle is large, with a carapace up to 3 feet long. Green turtles weigh up to 350 pounds and their carapace can be many colors, including shades of black, gray, green, brown or yellow.
Green sea turtle hatchling picture. The green turtle is large, with a carapace up to 3 feet long. Green turtles weigh up to 350 pounds and their carapace can be many colors, including shades of black, gray, green, brown or yellow.
Sea Lettuce (Ulva sp.)
Sea Lettuce Picture - Ulva lactuca - Photo of Sea Lettuce
Sea Lettuce Picture - Ulva lactuca - Photo of Sea Lettuce
Blue Mussel (Mytilus edulis)
Image of a blue mussel, Mytilus edulis, with a barnacle attached.
Image of a blue mussel, Mytilus edulis, with a barnacle attached.
Do Whales Sleep?
Whales are voluntary breathers, meaning they think about every breath they take. That means they can't sleep the way we do. Learn how cetaceans (whales, dolphins and porpoises) sleep, or rest.
Whales are voluntary breathers, meaning they think about every breath they take. That means they can't sleep the way we do. Learn how cetaceans (whales, dolphins and porpoises) sleep, or rest.
Humpback Whale Eye
Close-up image of a humpback whale (Megaptera novaeangliae), showing its eyes and the throat pleats, or ventral grooves, in the whale's throat.
Close-up image of a humpback whale (Megaptera novaeangliae), showing its eyes and the throat pleats, or ventral grooves, in the whale's throat.
Ocean Acidification
Ocean acidification is a lesser-known global warming problem. Ocean acidification is the process by which the pH of the oceans is lowered due to absorption of carbon dioxide. The oceans have helped the global warming problem for thousands of years by absorbing carbon dioxide. Now the basic chemistry of the oceans is changing because of our activities, with devastating consequences for marine life.
Ocean acidification is a lesser-known global warming problem. Ocean acidification is the process by which the pH of the oceans is lowered due to absorption of carbon dioxide. The oceans have helped the global warming problem for thousands of years by absorbing carbon dioxide. Now the basic chemistry of the oceans is changing because of our activities, with devastating consequences for marine life.
How Fast Can a Shark Swim
The shortfin mako shark (Isurus oxyrinchus) appears to be the fastest shark species. Learn more about this speedy shark and other fast shark species.
The shortfin mako shark (Isurus oxyrinchus) appears to be the fastest shark species. Learn more about this speedy shark and other fast shark species.
Shortfin Mako Shark
The shortfin mako is thought to be the fastest shark species in the world, capable of bursts of speed up to at least 22 mph. This shark is widely distributed throughout temperate and tropical oceans around the world. Their speed, leaping ability and determination make the shortfin mako a popular game fish.
The shortfin mako is thought to be the fastest shark species in the world, capable of bursts of speed up to at least 22 mph. This shark is widely distributed throughout temperate and tropical oceans around the world. Their speed, leaping ability and determination make the shortfin mako a popular game fish.
What Is Kelp
"Kelp" is the general term for 124 species of brown algae that are in the Order Laminariales. Learn about kelp forests, species that inhabit them and human uses for kelp.
"Kelp" is the general term for 124 species of brown algae that are in the Order Laminariales. Learn about kelp forests, species that inhabit them and human uses for kelp.
Southern Stingray
Southern stingrays, also called Atlantic southern stingrays, are a normally docile animal that frequents warm, shallow coastal waters. Southern stingrays have a diamond-shaped disc that is dark brown, gray or black on its upper side and white on the lower side. Southern stingrays have a long, whip-like tail with a barb at the end that they use for defense, but they rarely use it against humans unless they are provoked.
Southern stingrays, also called Atlantic southern stingrays, are a normally docile animal that frequents warm, shallow coastal waters. Southern stingrays have a diamond-shaped disc that is dark brown, gray or black on its upper side and white on the lower side. Southern stingrays have a long, whip-like tail with a barb at the end that they use for defense, but they rarely use it against humans unless they are provoked.
Green Sea Urchin (Strongylocentrotus drobachiensis)
Green Sea Urchin (Strongylocentrotus drobachiensis) Picture
Green Sea Urchin (Strongylocentrotus drobachiensis) Picture
Fin-Footed Marine Mammals
Pinnipeds are found all over the world and are a diverse group of marine mammals. The pinnipeds are in the order Carnivora and suborder Pinnipedia, and includes all the seals, sea lions and the walrus.
Pinnipeds are found all over the world and are a diverse group of marine mammals. The pinnipeds are in the order Carnivora and suborder Pinnipedia, and includes all the seals, sea lions and the walrus.
Bluefin Tuna
Atlantic bluefin tuna are a large, fast, streamlined fish that lives in the pelagic zone. They are a popular sportfish due to demand for tuna for sushi and other dishes. Atlantic bluefin tuna can swim at speeds up to 50 mph. Learn facts about bluefin tuna, including tuna classification, habitat, distribution and conservation.
Atlantic bluefin tuna are a large, fast, streamlined fish that lives in the pelagic zone. They are a popular sportfish due to demand for tuna for sushi and other dishes. Atlantic bluefin tuna can swim at speeds up to 50 mph. Learn facts about bluefin tuna, including tuna classification, habitat, distribution and conservation.
Types of Sirenians
The Order Sirenia includes manatees and dugongs, also known as "sea cows," probably because they graze on sea grasses and other aquatic plants. It also includes the extinct Steller's sea cow. Sirenians are found along the coasts and inland waterways of the United States, Central and South America, West Africa, Asia and Australia. Learn more about the types of sirenians here.
The Order Sirenia includes manatees and dugongs, also known as "sea cows," probably because they graze on sea grasses and other aquatic plants. It also includes the extinct Steller's sea cow. Sirenians are found along the coasts and inland waterways of the United States, Central and South America, West Africa, Asia and Australia. Learn more about the types of sirenians here.
Lobster Information
Learn about lobster facts, the American lobster, and answer questions such as why lobsters turn red when cooked.
Learn about lobster facts, the American lobster, and answer questions such as why lobsters turn red when cooked.
Manatee and Diver
A Florida manatee and a diver
A Florida manatee and a diver
Types of Marine Mammals
Learn about types of marine mammals, including whales, dolphins, porpoises, sirenians including manatees and dugongs and pinnipeds including seals and sea lions.
Learn about types of marine mammals, including whales, dolphins, porpoises, sirenians including manatees and dugongs and pinnipeds including seals and sea lions.
European Green Crab
The green crab (Carcinus maenas) is commonly found in New England tide pools and along the East Coast of the United States from Delaware to Nova Scotia, but this species is not native to the area. The green crab is now abundant in the U.S. and is thought to have been introduced into U.S. waters by the ballast water on ships coming from Europe. Learn about the green crab's feeding, reproduction and distribution.
The green crab (Carcinus maenas) is commonly found in New England tide pools and along the East Coast of the United States from Delaware to Nova Scotia, but this species is not native to the area. The green crab is now abundant in the U.S. and is thought to have been introduced into U.S. waters by the ballast water on ships coming from Europe. Learn about the green crab's feeding, reproduction and distribution.
How To Sex a Lobster
Want to know the sex of a lobster you've caught or are about to eat? Here's how to tell. Lobsters have feathery appendages called swimmerets underneath their tail. These swimmerets help a lobster swim and are also where a female lobster carries her eggs. Swimmerets also can clue you in to the sex of a lobster.
Want to know the sex of a lobster you've caught or are about to eat? Here's how to tell. Lobsters have feathery appendages called swimmerets underneath their tail. These swimmerets help a lobster swim and are also where a female lobster carries her eggs. Swimmerets also can clue you in to the sex of a lobster.
Manatees Gathered At a Power Plant
Florida Manatees Near a Power Plant in Apollo Beach, Florida
Florida Manatees Near a Power Plant in Apollo Beach, Florida
Florida Manatees Surfacing For Air
Florida manatees surfacing to breathe
Florida manatees surfacing to breathe
European Green Crab (Carcinus maenas)
European Green Crab (Carcinus maenas) Picture
European Green Crab (Carcinus maenas) Picture
Elasmobranch
The term elasmobranch refers to the sharks, rays and skates, which are in the subclass Elasmobranchii and class Chondrichthyes. The Condrichthyes class includes only one other subclass, the Holocephali (chimaeras), which are unusual fish found in deep water.
The term elasmobranch refers to the sharks, rays and skates, which are in the subclass Elasmobranchii and class Chondrichthyes. The Condrichthyes class includes only one other subclass, the Holocephali (chimaeras), which are unusual fish found in deep water.
Placoid Scales
Placoid scales (dermal denticles) are tough scales that cover the skin of elasmobranchs (sharks and rays). Even though placoid scales are similar to the scales of bony fish, they are really modified teeth and are covered with a hard enamel.
Placoid scales (dermal denticles) are tough scales that cover the skin of elasmobranchs (sharks and rays). Even though placoid scales are similar to the scales of bony fish, they are really modified teeth and are covered with a hard enamel.
Irish Moss (Chondrus crispus)
Image of Irish Moss - Chondrus crispus
Image of Irish Moss - Chondrus crispus
Manatees
Manatees Near the Tampa Electric Power Plant in Apollo Beach, Florida
Manatees Near the Tampa Electric Power Plant in Apollo Beach, Florida
Are Whales Fish
The short answer: whales are not fish. Whales are mammals, just like you and me. All mammals are endothermic (commonly called warm-blooded), give birth to live young and nurse their young, breathe oxygen from air, and have hair (yes, even whales do!). If you're still not convinced, here are some specific ways that whales differ from fish.
The short answer: whales are not fish. Whales are mammals, just like you and me. All mammals are endothermic (commonly called warm-blooded), give birth to live young and nurse their young, breathe oxygen from air, and have hair (yes, even whales do!). If you're still not convinced, here are some specific ways that whales differ from fish.
Albinism in Cetaceans
Albinism has been documented in 20 cetacean species, including humpback whales, sperm whales, pilot whales, and bottlenose dolphins. White (not necessarily true albinos) killer whales and southern right whales have also been documented recently. A pink dolphin was recently spotted in Louisiana.
Albinism has been documented in 20 cetacean species, including humpback whales, sperm whales, pilot whales, and bottlenose dolphins. White (not necessarily true albinos) killer whales and southern right whales have also been documented recently. A pink dolphin was recently spotted in Louisiana.
Humpback Whale Diving
Image of a humpback whale diving, or fluking.
Image of a humpback whale diving, or fluking.
Marine Life - Profiles
An index of Profiles for the Marine Life guide site.
An index of Profiles for the Marine Life guide site.
Humpback Whale Feeding
A humpback whale lunge-feeding in the Gulf of Maine.
A humpback whale lunge-feeding in the Gulf of Maine.
Chromista
The Kingdom Chromista contains plant-like organisms that possess chlorophyll a and c and other pigments that give them their yellow-brown color (fucoxanthin). Examples of chromists: brown algae (e.g., kelp), water molds, diatoms.
The Kingdom Chromista contains plant-like organisms that possess chlorophyll a and c and other pigments that give them their yellow-brown color (fucoxanthin). Examples of chromists: brown algae (e.g., kelp), water molds, diatoms.
Humpback Whales Exhaling, or Spouting
Two humpback whales (Megaptera novaeangliae) exhale, or spout in the Gulf of Maine.
Two humpback whales (Megaptera novaeangliae) exhale, or spout in the Gulf of Maine.
Photo-Identification Research
By photographing unique physical characteristics of whales, researchers can tell many individuals apart within a population of a particular species. Once a sighting record is established for individual whales, researchers are able to study their movements, migration, feeding patterns and life history. Learn how to tell individual whales apart here.
By photographing unique physical characteristics of whales, researchers can tell many individuals apart within a population of a particular species. Once a sighting record is established for individual whales, researchers are able to study their movements, migration, feeding patterns and life history. Learn how to tell individual whales apart here.
Spider Crab
Spider Crab Image
Spider Crab Image
Blubber
Blubber is a fat layer underneath an animal’s skin. Blubber is composed of fat-filled cells and functions both to insulate and to store food reserves. Animals that have blubber include whales, seals and walruses.
Blubber is a fat layer underneath an animal’s skin. Blubber is composed of fat-filled cells and functions both to insulate and to store food reserves. Animals that have blubber include whales, seals and walruses.
Humpback Whales Feeding While Whale Watchers Look On
View photos of humpback whales including images of humpback whale tails, whales diving, feeding and with their calves.
View photos of humpback whales including images of humpback whale tails, whales diving, feeding and with their calves.
Chinese Mitten Crab
The Chinese mitten crab - Eriocheir sinensis - is native to East Asia and has unique hairy claws. The Chinese mitten crab is considered one of the top 100 world's worst invasive species. Learn more about the Chinese mitten crab's distribution, classification, feeding and reproduction.
The Chinese mitten crab - Eriocheir sinensis - is native to East Asia and has unique hairy claws. The Chinese mitten crab is considered one of the top 100 world's worst invasive species. Learn more about the Chinese mitten crab's distribution, classification, feeding and reproduction.
10 Tide Pooling Tips
Going on vacation along a rocky shore? Visiting a tide pool is a great way to see and learn about a wide variety of marine life, and great outdoor activity for families. It may not seem like there's much there from a distance, but look closely at a tide pool and you're sure to meet lots of interesting types of marine life. Tide pooling is a great activity, but do it with the safety of both you and your family, and the marine environment, in mind.
Going on vacation along a rocky shore? Visiting a tide pool is a great way to see and learn about a wide variety of marine life, and great outdoor activity for families. It may not seem like there's much there from a distance, but look closely at a tide pool and you're sure to meet lots of interesting types of marine life. Tide pooling is a great activity, but do it with the safety of both you and your family, and the marine environment, in mind.
Marine Invasives
Countries around the world are the recipients of unwanted visitors each year – invasive species. Invasive species can be plants, animals or other organisms such as microbes. They are introduced into new habitats primarily by humans. Learn what an invasive species is and how they effect the environment.
Countries around the world are the recipients of unwanted visitors each year – invasive species. Invasive species can be plants, animals or other organisms such as microbes. They are introduced into new habitats primarily by humans. Learn what an invasive species is and how they effect the environment.
Fin Whale - Balaenoptera physalus
Fin whale (Balaenoptera physalus) Picture
Fin whale (Balaenoptera physalus) Picture
Blue Whale (Balaenoptera musculus)
Blue Whale Picture - Balaenoptera musculus - Photo of a Blue Whale
Blue Whale Picture - Balaenoptera musculus - Photo of a Blue Whale
Type of Manatees
Learn about the different types of manatees and manatee species, including the West Indian manatee, Florida manatee, Amazonian manatee and West African manatee.
Learn about the different types of manatees and manatee species, including the West Indian manatee, Florida manatee, Amazonian manatee and West African manatee.
How Coral Reefs Form
Coral reefs are centers of biodiversity, where you'll find many types of fish,invertebrates and other marine life. Coral reefs are composed of animals called stony corals. Corals are made up of tiny organisms called polyps.
Coral reefs are centers of biodiversity, where you'll find many types of fish,invertebrates and other marine life. Coral reefs are composed of animals called stony corals. Corals are made up of tiny organisms called polyps.
Spiracle
Spiracles are found in bottom-dwelling sharks and rays. Spiracles are a pair of openings just behind the animal's eyes that allow it to draw oxygenated water in from above.
Spiracles are found in bottom-dwelling sharks and rays. Spiracles are a pair of openings just behind the animal's eyes that allow it to draw oxygenated water in from above.
Plankton
"Plankton" is the term that generally refers to the "floaters," the organisms in the ocean that drift with the currents. This includes the algae, zooplankton ("animal plankton"), phytoplankton (plankton that are capable of photosynthesis) and bacteria.
"Plankton" is the term that generally refers to the "floaters," the organisms in the ocean that drift with the currents. This includes the algae, zooplankton ("animal plankton"), phytoplankton (plankton that are capable of photosynthesis) and bacteria.
Fin Whale Spouting
Fin whale (Balaenoptera physalus) spouting
Fin whale (Balaenoptera physalus) spouting
Asteroidea
While the classification name, "Asteroidea," may not be familiar, the organisms it contains likely are. Asteroidea includes the sea stars, commonly called starfish. Starfish can be a range of sizes and colors, and are a wide-ranging marine invertebrate. Organisms in the Class Asteroidea have several arms (usually between 5 and 40) arranged around a central disk.
While the classification name, "Asteroidea," may not be familiar, the organisms it contains likely are. Asteroidea includes the sea stars, commonly called starfish. Starfish can be a range of sizes and colors, and are a wide-ranging marine invertebrate. Organisms in the Class Asteroidea have several arms (usually between 5 and 40) arranged around a central disk.
Close Encounter With a Humpback Whale
A humpback whale (Megaptera novaeangliae) checks out a whale watch boat.
A humpback whale (Megaptera novaeangliae) checks out a whale watch boat.
Shark Conservation Act
To aid in shark conservation and demonstrate the importance of sharks to the U.S., the Shark Conservation Act of 2009 was introduced. Over 70 million sharks are killed annually, and many shark species are considered overfished. Sharks are fished for sport, caught as and hunted for their fins in a practice called shark finning. Overfishing of sharks could be drastic to the ocean food web.
To aid in shark conservation and demonstrate the importance of sharks to the U.S., the Shark Conservation Act of 2009 was introduced. Over 70 million sharks are killed annually, and many shark species are considered overfished. Sharks are fished for sport, caught as and hunted for their fins in a practice called shark finning. Overfishing of sharks could be drastic to the ocean food web.
Knotted Wrack (Ascophyllum nodosum)
Knotted wrack (Ascophyllum nodosum)
Knotted wrack (Ascophyllum nodosum)
Manatee and Her Calf
A Florida manatee with her calf
A Florida manatee with her calf
Blue Whale (Balaenoptera musculus) Spouting
Blue Whale Picture - Balaenoptera musculus - Photo of a Blue Whale Spouting
Blue Whale Picture - Balaenoptera musculus - Photo of a Blue Whale Spouting
Marine Life - Articles
An index of articles for the Marine Life guide site.
An index of articles for the Marine Life guide site.
Humpback Whale Named Apostrophe
A humpback whale (Megaptera novaeangliae) known as "Apostrophe" to Gulf of Maine whale researchers dives into the North Atlantic Ocean.
A humpback whale (Megaptera novaeangliae) known as "Apostrophe" to Gulf of Maine whale researchers dives into the North Atlantic Ocean.
Humpback Whale Lunge-Feeding
View photos of humpback whales including images of humpback whale tails, whales diving, feeding and with their calves.
View photos of humpback whales including images of humpback whale tails, whales diving, feeding and with their calves.
Coral
Corals are animals in the Phylum Cnidaria. Cnidarians also include sea fans, sea pansies and anemones. Corals are in the Class Anthozoa, and can be divided further into the stony corals - Order Scleractinia, the builders of coral reefs, and soft corals - Order Alcyonacea, which are soft or leathery and include species such as bubblegum corals and mushroom corals.
Corals are animals in the Phylum Cnidaria. Cnidarians also include sea fans, sea pansies and anemones. Corals are in the Class Anthozoa, and can be divided further into the stony corals - Order Scleractinia, the builders of coral reefs, and soft corals - Order Alcyonacea, which are soft or leathery and include species such as bubblegum corals and mushroom corals.
Chordata
Chordata is the phylum that includes all the animals that have a notochord, or nerve cord, at some stage of their development. Animals in this phylum are known as chordates. The most well-known chordates are the vertebrates - animals that have a spine.
Chordata is the phylum that includes all the animals that have a notochord, or nerve cord, at some stage of their development. Animals in this phylum are known as chordates. The most well-known chordates are the vertebrates - animals that have a spine.
Turtle Excluder Device (TED)
Turtle excluder devices (TEDs) were created to protect sea turtles from getting caught in shrimp nets. The TED is attached to a shrimp trawling net and is a grid of metal bars that has an opening at the top or bottom, creating a hatch that allows sea turtles and larger fish to escape. Small animals such as shrimp go between the bars and are caught in the end of the trawl.
Turtle excluder devices (TEDs) were created to protect sea turtles from getting caught in shrimp nets. The TED is attached to a shrimp trawling net and is a grid of metal bars that has an opening at the top or bottom, creating a hatch that allows sea turtles and larger fish to escape. Small animals such as shrimp go between the bars and are caught in the end of the trawl.
Maximum Sustainable Yield
The maximum sustainable yield (MSY) is a term often used in fisheries management.
The maximum sustainable yield (MSY) is a term often used in fisheries management.
Coral Bleaching
Coral bleaching happens when coral polyps, the animals that build corals, shed the algae - zooxanthellae - that give them their color, and which are necessary for their survival. The coral is then bleached, or white in appearance.
Coral bleaching happens when coral polyps, the animals that build corals, shed the algae - zooxanthellae - that give them their color, and which are necessary for their survival. The coral is then bleached, or white in appearance.
Humpback Whale
Humpback whales (Megaptera novaeangliae) are found in all the world's oceans. Learn about the humpback whale and its behaviors, including feeding, reproduction and communication.
Humpback whales (Megaptera novaeangliae) are found in all the world's oceans. Learn about the humpback whale and its behaviors, including feeding, reproduction and communication.
Acadian Hermit Crab (Pagurus acadianus)
Acadian Hermit Crab (Pagurus acadianus) Picture
Acadian Hermit Crab (Pagurus acadianus) Picture
Phylum
The term phylum is one of seven major categories that are used to classify organisms. In order of broad to specific, these seven categories are: Kingdom, Phylum, Class, Order, Family, Genus, and Species. This classification system was developed by Carolus Linnaeus in the 18th century
The term phylum is one of seven major categories that are used to classify organisms. In order of broad to specific, these seven categories are: Kingdom, Phylum, Class, Order, Family, Genus, and Species. This classification system was developed by Carolus Linnaeus in the 18th century
Humpback Whale Tail Fluke
Humpback Whale (Megaptera novaeangliae) Picture
Humpback Whale (Megaptera novaeangliae) Picture
Knotted Wrack
Air bladders in brown algae knotted wrack - Ascophyllum nodosum
Air bladders in brown algae knotted wrack - Ascophyllum nodosum
Dermal Denticle
Dermal denticles (placoid scales) are tough scales that cover the skin of elasmobranchs (sharks and rays). Even though denticles are similar to scales, they are really modified teeth and are covered with a hard enamel.
Dermal denticles (placoid scales) are tough scales that cover the skin of elasmobranchs (sharks and rays). Even though denticles are similar to scales, they are really modified teeth and are covered with a hard enamel.
Dugong - Dugong dugon
Dugongs join manatees in the Order Sirenia, the group of animals that inspired tales of mermaids. With their grayish-brown skin and whiskered face, dugongs resemble manatees, but are found on the other side of the world. Learn about dugong classification, reproduction, habitat, distribution and conservation.
Dugongs join manatees in the Order Sirenia, the group of animals that inspired tales of mermaids. With their grayish-brown skin and whiskered face, dugongs resemble manatees, but are found on the other side of the world. Learn about dugong classification, reproduction, habitat, distribution and conservation.
Countershading
Countershading is a type of coloration commonly found in animals, and means that the animal's back (dorsal side) is dark while its underside (ventral side) is light.
Countershading is a type of coloration commonly found in animals, and means that the animal's back (dorsal side) is dark while its underside (ventral side) is light.
Humpback Calf Breaching Next to its Mother
Humpback whale (Megaptera novaeangliae) calf breaches next to its mother.
Humpback whale (Megaptera novaeangliae) calf breaches next to its mother.
Ectothermic
Definition of ectothermic. An ectothermic animal is one who cannot regulate its own body temperature, so its body temperature fluctuates according to its surroundings.
Definition of ectothermic. An ectothermic animal is one who cannot regulate its own body temperature, so its body temperature fluctuates according to its surroundings.
West Indian Manatee
The West Indian manatee is an easily recognizable marine mammal. In the United States, it is more well-known by the name of one of its subspecies - the Florida manatee. The West Indian manatee is the largest manatee species, growing to lengths of 13 feet and weighing over 3,000 pounds. West Indian manatees have grayish or brownish skin, a rounded tail, and a set of nails on its forelimbs.
The West Indian manatee is an easily recognizable marine mammal. In the United States, it is more well-known by the name of one of its subspecies - the Florida manatee. The West Indian manatee is the largest manatee species, growing to lengths of 13 feet and weighing over 3,000 pounds. West Indian manatees have grayish or brownish skin, a rounded tail, and a set of nails on its forelimbs.
Sea Spider
Sea Spider Image
Sea Spider Image
Florida Manatee
The Florida manatee - Trichechus manatus latirostris, also called the "sea cow," is an unusual looking marine mammal, with their whiskered face, round body and paddle-like tail. Manatees have been the subject of intense awareness and conservation efforts in recent years due to threats from human activities. Learn about the Florida manatee's classification, reproduction, distribution and feeding habits, and view photos of manatees.
The Florida manatee - Trichechus manatus latirostris, also called the "sea cow," is an unusual looking marine mammal, with their whiskered face, round body and paddle-like tail. Manatees have been the subject of intense awareness and conservation efforts in recent years due to threats from human activities. Learn about the Florida manatee's classification, reproduction, distribution and feeding habits, and view photos of manatees.
Humpback Whale Head
A close-up image of a humpback whale's head.
A close-up image of a humpback whale's head.
What Do Manatees Eat
Manatees are herbivores, feeding primarily on aquatic plants. Learn about the types of food manatees eat.
Manatees are herbivores, feeding primarily on aquatic plants. Learn about the types of food manatees eat.
Echolocation
Toothed whales, such as dolphins, porpoises and orcas, make high-frequency sounds that bounce off of whatever is in front of them, including prey, terrain and obstacles. They receive these sounds and can sense the size, shape, density, distance and even the texture of the object in front of them. This is called echolocation.
Toothed whales, such as dolphins, porpoises and orcas, make high-frequency sounds that bounce off of whatever is in front of them, including prey, terrain and obstacles. They receive these sounds and can sense the size, shape, density, distance and even the texture of the object in front of them. This is called echolocation.
Zoology
Zoology is the scientific study of animals.
Zoology is the scientific study of animals.
Southern Kelp (Sugar Kelp)
Image of Southern Kelp - Sugar Kelp - Laminaria saccharina
Image of Southern Kelp - Sugar Kelp - Laminaria saccharina
Pygmy Sperm Whale
The pygmy sperm whale is an odontocete, or toothed whale. The pygmy sperm whale is a fairly small whale with a squarish head and is stocky in appearance. They travel individually or in small groups of up to 5 whales.
The pygmy sperm whale is an odontocete, or toothed whale. The pygmy sperm whale is a fairly small whale with a squarish head and is stocky in appearance. They travel individually or in small groups of up to 5 whales.
Cetacean
"Cetacean" is the word for all mammals in the order Cetacea, which includes whales, dolphins and porpoises.
"Cetacean" is the word for all mammals in the order Cetacea, which includes whales, dolphins and porpoises.
Whale Migration
There are over 80 species of whales, and each has their own movement patterns, but in general, whales migrate toward the colder poles in the summer and toward the more tropical waters of the equator in the winter. This pattern allows whales to take advantage of the productive feeding grounds in colder waters in the summer, and then when productivity lowers, to migrate to warmer waters and give birth to calves.
There are over 80 species of whales, and each has their own movement patterns, but in general, whales migrate toward the colder poles in the summer and toward the more tropical waters of the equator in the winter. This pattern allows whales to take advantage of the productive feeding grounds in colder waters in the summer, and then when productivity lowers, to migrate to warmer waters and give birth to calves.
American Lobster
Many think of lobster as a bright red delicacy served up with a side of butter. But the American lobster (often called the Maine lobster), while a popular seafood, is also a fascinating animal with a complex life. Lobsters have been described as aggressive, territorial, and cannibalistic, but you may be surprised to know they've also been referred to as "tender lovers".
Many think of lobster as a bright red delicacy served up with a side of butter. But the American lobster (often called the Maine lobster), while a popular seafood, is also a fascinating animal with a complex life. Lobsters have been described as aggressive, territorial, and cannibalistic, but you may be surprised to know they've also been referred to as "tender lovers".
Why Lobsters Turn Red
Lobsters are bright red on your plate, but they are usually a brownish-green in the wild. What happens between the sea and the dinner table to turn them bright red?
Lobsters are bright red on your plate, but they are usually a brownish-green in the wild. What happens between the sea and the dinner table to turn them bright red?
Pneumatocyst
Pneumatocysts, or air bladders, are gas-filled sacs in an algae that that float the algae's blades up toward the water's surface, providing greater access to sunlight for photosynthesis.
Pneumatocysts, or air bladders, are gas-filled sacs in an algae that that float the algae's blades up toward the water's surface, providing greater access to sunlight for photosynthesis.
Gray Seal Profile
Gray seals - Halichoerus grypus - are pinnipeds with a long snout and horse-like head. This characteristic is referenced in the gray seal’s unromantic scientific name, which translates to “hook-nosed pig of the sea.” Learn about the gray seal and their distribution, migration, behavior and conservation.
Gray seals - Halichoerus grypus - are pinnipeds with a long snout and horse-like head. This characteristic is referenced in the gray seal’s unromantic scientific name, which translates to “hook-nosed pig of the sea.” Learn about the gray seal and their distribution, migration, behavior and conservation.
Fin Whale
The fin whale is the world's second-largest species. Fin whales are a streamlined animal and the only mammal known to be asymmetrically-colored. Learn about this interesting species here.
The fin whale is the world's second-largest species. Fin whales are a streamlined animal and the only mammal known to be asymmetrically-colored. Learn about this interesting species here.