Marine Life: Most Popular Articles
These articles are the most popular over the last month.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Leatherback Sea Turtle (Dermochelys coriacea) Picture
Leatherback Sea Turtle Picture
Leatherback Sea Turtle Picture
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.”
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Common Periwinkle (Littorina littorea)
Common Periwinkle (Littorina littorea) Picture
Common Periwinkle (Littorina littorea) Picture
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.
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.
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.
Northern Sea Star (Asterias vulgaris)
Northern Sea Star (Asterias vulgaris) Picture
Northern Sea Star (Asterias vulgaris) Picture
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
European Green Crab (Carcinus maenas)
European Green Crab (Carcinus maenas) Picture
European Green Crab (Carcinus maenas) Picture
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."
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
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).
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.
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.
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.
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.
Cartilage
Cartilage is a tough, flexible tissue, which is softer than bone.
Cartilage is a tough, flexible tissue, which is softer than bone.
Right Whale (Eubalaena Glacialis) Poop
Image of right whale (Eubalaena glacialis) poop
Image of right whale (Eubalaena glacialis) poop
Humpback Whale Feeding
A humpback whale lunge-feeding in the Gulf of Maine.
A humpback whale lunge-feeding in the Gulf of Maine.
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.
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.
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.
Humpback whale tail-breaching
A humpback whale throws its tail into the air as during a tail breach.
A humpback whale throws its tail into the air as during a tail breach.
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.
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.
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
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.
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.
Sustainable Seafood
Do you love seafood but worry about the environmental impacts of what you’re eating? There can be a big difference in the ways the same seafood species is caught, and the resulting effects on the marine environment. Several organizations have taken it upon themselves to make us all more informed. Here are some ways you can learn more about seafood choices and what you need to know to ask the right questions when you purchase, whether it’s at the grocery store, a fish market or in a restaurant.
Do you love seafood but worry about the environmental impacts of what you’re eating? There can be a big difference in the ways the same seafood species is caught, and the resulting effects on the marine environment. Several organizations have taken it upon themselves to make us all more informed. Here are some ways you can learn more about seafood choices and what you need to know to ask the right questions when you purchase, whether it’s at the grocery store, a fish market or in a restaurant.
Acadian Hermit Crab (Pagurus acadianus)
Acadian Hermit Crab (Pagurus acadianus) Picture
Acadian Hermit Crab (Pagurus acadianus) Picture
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.
Humpback Whale Head
A close-up image of a humpback whale's head.
A close-up image of a humpback whale's head.
Knotted Wrack (Ascophyllum nodosum)
Knotted wrack (Ascophyllum nodosum)
Knotted wrack (Ascophyllum nodosum)
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.
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.
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.
Sea Lettuce (Ulva sp.)
Sea Lettuce Picture - Ulva lactuca - Photo of Sea Lettuce
Sea Lettuce Picture - Ulva lactuca - Photo of Sea Lettuce
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.
Humpback Whale Diving
Humpback whale (Megaptera novaeangliae) diving into the Gulf of Maine.
Humpback whale (Megaptera novaeangliae) diving into the Gulf of Maine.
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.
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.
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.
Humpback Whale and Calf
Humpback whale (Megaptera novaeangliae) and calf
Humpback whale (Megaptera novaeangliae) and calf
Humpback Whale Exhaling, or Spouting
A humpback whale blows air out of its blowholes underwater.
A humpback whale blows air out of its blowholes underwater.
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.
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.
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.
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.
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.
Irish Moss (Chondrus crispus)
Image of Irish Moss - Chondrus crispus
Image of Irish Moss - Chondrus crispus
Fin Whale - Balaenoptera physalus
Fin whale (Balaenoptera physalus) Picture
Fin whale (Balaenoptera physalus) Picture
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.
Humpback Whale Heads Toward the Camera
A humpback whale heads toward the camera.
A humpback whale heads toward the camera.
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.
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.
Southern Kelp (Sugar Kelp)
Image of Southern Kelp - Sugar Kelp - Laminaria saccharina
Image of Southern Kelp - Sugar Kelp - Laminaria saccharina
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.
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.
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.
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.
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.
Manatees
Manatees Near the Tampa Electric Power Plant in Apollo Beach, Florida
Manatees Near the Tampa Electric Power Plant in Apollo Beach, Florida
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.
Green Sea Urchin (Strongylocentrotus drobachiensis)
Green Sea Urchin (Strongylocentrotus drobachiensis) Picture
Green Sea Urchin (Strongylocentrotus drobachiensis) Picture
Fin Whale Spouting
Fin whale (Balaenoptera physalus) spouting
Fin whale (Balaenoptera physalus) spouting
Humpback Whale Tail Fluke
Humpback Whale (Megaptera novaeangliae) Picture
Humpback Whale (Megaptera novaeangliae) Picture
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.
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.
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.
Knotted Wrack
Air bladders in brown algae knotted wrack - Ascophyllum nodosum
Air bladders in brown algae knotted wrack - Ascophyllum nodosum
sonarandwhalesCA
The U.S. Supreme Court ruled on November 12, 2008 that the U.S. Navy could continue using high-powered sonar as part of its training exercises, possibly at the expense of whales and other marine mammals. The sonar is used to detect enemy ships, and the Navy argued that the sonar is needed to effectively train and protect the nation.
The U.S. Supreme Court ruled on November 12, 2008 that the U.S. Navy could continue using high-powered sonar as part of its training exercises, possibly at the expense of whales and other marine mammals. The sonar is used to detect enemy ships, and the Navy argued that the sonar is needed to effectively train and protect the nation.
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
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.
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.
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.
Blue Whale (Balaenoptera musculus)
Blue Whale Picture - Balaenoptera musculus - Photo of a Blue Whale
Blue Whale Picture - Balaenoptera musculus - Photo of a Blue Whale
Humpback Whale Lunge-Feeding
Humpback whale (Megaptera novaeangliae) lunge-feeding, showing baleen
Humpback whale (Megaptera novaeangliae) lunge-feeding, showing baleen
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.
Cnidaria
Cnidaria is a classification phylum that includes corals, sea anemones, sea jellies (jellyfish), sea pens, and hydras. Cnidarians are radially symmetrical and have tentacles with stinging structures called nematocysts.
Cnidaria is a classification phylum that includes corals, sea anemones, sea jellies (jellyfish), sea pens, and hydras. Cnidarians are radially symmetrical and have tentacles with stinging structures called nematocysts.
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.
North Atlantic Right Whale (Eubalaena glacialis)
North Atlantic Right Whale (Eubalaena glacialis) Head
North Atlantic Right Whale (Eubalaena glacialis) Head
Blue American Lobster (Homarus americanus)
View images of American lobster and learn about lobsters, a fascinating crustacean. American lobster photos include photos of lobster traps, unusual lobsters like blue lobsters, and captions with interesting lobster facts.
View images of American lobster and learn about lobsters, a fascinating crustacean. American lobster photos include photos of lobster traps, unusual lobsters like blue lobsters, and captions with interesting lobster facts.
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.
Spider Crab
Spider Crab Image
Spider Crab Image
Radula
The radula is a special structure used by many molluscs to scrape food off rocks or create depressions in rocks that the mollusc uses for habitat.
The radula is a special structure used by many molluscs to scrape food off rocks or create depressions in rocks that the mollusc uses for habitat.
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.
Manatee and Diver
A Florida manatee and a diver
A Florida manatee and a diver
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.
Carapace
A carapace is a shell on an animal’s back, or part of its back.
A carapace is a shell on an animal’s back, or part of its back.
Minke Whale (Balaenoptera acutorostrata)
Minke Whale (Balaenoptera acutorostrata)
Minke Whale (Balaenoptera acutorostrata)
Florida Manatees Surfacing For Air
Florida manatees surfacing to breathe
Florida manatees surfacing to breathe
Holdfast
A holdfast is the root-like structure at the base of an algae (seaweed) that fastens the algae to a hard substrate. Holdfasts are prominent in brown algaes and seaweeds such as kelp.
A holdfast is the root-like structure at the base of an algae (seaweed) that fastens the algae to a hard substrate. Holdfasts are prominent in brown algaes and seaweeds such as kelp.
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
Ghost Crab (Ocypode quadrata)
Ghost Crab Image
Ghost Crab Image
Where Basking Sharks Migrate
Basking shark migration has been questioned by scientists for decades. It has been speculated that these animals, the world's second-largest fish, hibernate on the ocean bottom during the winter. A tagging study released in 2009 revealed that basking sharks head south in the winter, further than scientists ever dreamed.
Basking shark migration has been questioned by scientists for decades. It has been speculated that these animals, the world's second-largest fish, hibernate on the ocean bottom during the winter. A tagging study released in 2009 revealed that basking sharks head south in the winter, further than scientists ever dreamed.
Marine Protected Area
Marine Protected Areas (MPAs) are used to protect natural and/or cultural areas from human impacts and to help sustain important habitats. One MPA may be much different from another in terms of restrictions and management approaches.
Marine Protected Areas (MPAs) are used to protect natural and/or cultural areas from human impacts and to help sustain important habitats. One MPA may be much different from another in terms of restrictions and management approaches.
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.
Skeleton Shrimp
Skeleton shrimp image
Skeleton shrimp image
Whales and Entanglements
Entanglement in fishing gear is one of the major threats to whales today. Learn about whale entanglements in fishing gear, and how whales are rescued.
Entanglement in fishing gear is one of the major threats to whales today. Learn about whale entanglements in fishing gear, and how whales are rescued.
Prehensile
A body part that is prehensile is one that is adapted for grasping or seizing.
A body part that is prehensile is one that is adapted for grasping or seizing.
Marine Life - Articles
An index of articles for the Marine Life guide site.
An index of articles for the Marine Life guide site.
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.
North Atlantic Right Whale
The North Atlantic right whale’s Latin name, Eubalaena glacialis, translates to “true whale of the ice.” The name right whale is appropriate because whalers considered this the “right” whale to hunt. North Atlantic right whales are one of the most endangered whale species.
The North Atlantic right whale’s Latin name, Eubalaena glacialis, translates to “true whale of the ice.” The name right whale is appropriate because whalers considered this the “right” whale to hunt. North Atlantic right whales are one of the most endangered whale species.
Marine Life - Profiles
An index of Profiles for the Marine Life guide site.
An index of Profiles for the Marine Life guide site.
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.
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?
Beluga Whale
Beluga whales are cetaceans that belong to the Suborder Odontoceti, the toothed whales. Belugas are found in Arctic and subarctic ocean waters and the St. Lawrence River, which connects the Great Lakes with the Atlantic Ocean and runs through New York State and the Canadian provinces of Ontario and Quebec. These whales are easily recognizable by their white coloration and were called "sea canaries" by sailors.
Beluga whales are cetaceans that belong to the Suborder Odontoceti, the toothed whales. Belugas are found in Arctic and subarctic ocean waters and the St. Lawrence River, which connects the Great Lakes with the Atlantic Ocean and runs through New York State and the Canadian provinces of Ontario and Quebec. These whales are easily recognizable by their white coloration and were called "sea canaries" by sailors.