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Marine Life: Most Popular Articles

These articles are the most popular over the last month.
10 Largest Sea Creatures
The ocean contains some of the largest creatures on Earth. In this slide show, you can see and learn facts about the largest living sea creatures.
What Causes a Killer Whale's Dorsal Fin to...
Learn why a killer whale - orca's - dorsal fin collapses, or flops over, when it is in captivity.
Do Sharks Lay Eggs?
Do sharks lay eggs? Here you can learn about ways sharks reproduce, including whether they lay eggs or give birth to live young.
10 Surprising Facts About Starfish
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.
Types of Whales
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. Learn about and see photos of featured cetacean species.
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.
10 Facts on How Scallops Live, Feed, and...
Facts about scallops. Learn about where scallops live, how big they grow, what they eat and how they reproduce. When you eat a scallop, what part are you actually eating?
10 Things You Don't Know About Sharks
Sharks have a fierce reputation, but fascinating biology. Here we'll explore ten facts about sharks
10 Fascinating Facts About Seahorses
Facts about seahorses, including the number of seahorse species, where seahorses live, what they eat and how they reproduce.
Top 3 Shark Species Most Likely to Attack
What type of sharks are most likely to attack? Of the hundreds of shark species, there are 3 most often implicated in unprovoked shark attacks on humans. Learn more about these three species, and how you can prevent a shark attack.
What Is the Biggest Fish in the World?
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.
Explore the 10 Species of Hammerhead Sharks
Learn about the various species of hammerhead shark, all of which have an interestingly shaped head. They range in size from about 3 to 20 feet long.
Sand Dollars
Find a sand dollar shell (test) on the beach? Here you can learn all about sand dollars - what they are, where they live, what they eat and how they reproduce.
How Much Money Can a Marine Biologist Make?
What is the salary of a marine biologist? Learn about a marine biologist's job and salary range.
What Is a Biological Adaptation?
An adaptation is a physical or behavioral characteristic that has developed to allow an organism to better survive in its environment.
What Is a Sand Dollar?
What is a sand dollar, really? Is it a living animal? Learn the basics about sand dollars here.
What’s the Fastest Fish?
What is the fastest fish in the ocean? Learn the answer here.
What You Should Know about the 7 Species of Sea...
There are seven recognized species of sea turtles. See photos and learn facts about these seven species.
Types of Sharks
Learn about the types of sharks with this list of sharks species and facts about each.
What's the World's Biggest Shark?
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.
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.
Like Fish? Think About Being a Marine Biologist
When you picture a marine biologist, what comes to mind? Many picture a dolphin trainer, or maybe Jacques Cousteau. But marine biology covers a wide range of activities and organisms, and so does the job of a marine biologist. Here you can learn what a marine biologist is, what marine biologists do, and how you can become a marine biologist.
How Do You Distinguish a Male Lobster From a...
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.
What Is Inside a Sand Dollar?
What is inside a sand dollar shell? Here you can find out.
What's It Like to Be a Marine Biologist?
Learn about the term marine biologist - what a marine biologist is, what marine biologists do, steps to becoming a marine biologist, and how much marine biologists earn.
What Are the 3 Types of Marine 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.
10 Fun Facts About Sea Turtles
There are seven recognized species of sea turtles, and all are endangered. Learn facts about sea turtles, including where they live, how they reproduce, and what they eat.
What Is the Deepest Part of the Ocean?
What is the deepest part of the ocean? Learn about the ocean's deepest point, how deep it is, and what lives there.
9 Cool 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.
What Do Seahorses Eat?
What do seahorses eat? Marine Life.
What Is a Crustacean?
The group of marine life known as crustaceans includes crabs, lobsters and shrimp - some of the most important marine life to humans. It also includes other animals such as amphipods and isopods. The crustaceans are in the Phylum Arthropoda and Subphylum Crustacea. Here you'll find the definition of crustacean and learn more about crustaceans.
Learn About 4 Different Seal Species
There are 32 species of seals. Here are 5, including Harbor seals (also called common seals). with links to further information.
Do Starfish Have Eyes?
Do starfish have eyes? Information about starfish (sea star) eyes. While it may appear that starfish have eyes, they do. Learn where the eyes are on a starfish.
10 Facts About Killer Whales (Orcas)
Learn 10 facts about killer whales (orcas).
Are Whales Fish?
Whales are mammals. They are endothermic (warm-blooded), give birth to live young and nurse them, breathe oxygen from air, and have hair. Details here.
Why Should We Protect Sharks?
Why protect sharks? Learn about threats to sharks, why sharks are important, and how you can help sharks.
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.
10 Fun Facts About Seals
Seals are divided into two families, the Phocidae, the earless or seals (e.g., harbor or common seals), and the Otariidae, the eared seals (e.g., fur seals and sea lions). Here you can learn 10 fascinating facts about seals.
Whale, Dolphin, or Porpoise: What Are the...
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.
What Is a Cartilaginous Fish?
What is a cartilaginous fish? Learn about cartilaginous fish - the group of fish that includes elasmobranchs: sharks, rays and skates.
Ovoviviparous
Ovoviviparous animals produce eggs, but instead of laying the eggs, the eggs develop within the mother's body and are birthed live.
Facts About the World’s Largest Sharks
Whale shark facts. Facts about whale sharks, including where whale sharks live, what whale sharks eat, where to see whale sharks, and how whale sharks reproduce.
What to Know About 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.
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.
How Do Dolphins Sleep?
How do dolphins sleep? Find out about how dolphins sleep - you may be surprised at the answer.
Echinoderms - Phylum Echinodermata
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.
10 Facts About the Large (and Strange!) Ocean...
Learn about the ocean sunfish - mola mola - how big it is, where it lives, what it eats, and how it reproduces.
12 Interesting Facts About Nudibranchs
What do nudibranchs eat? How do nudibranchs reproduce? Learn more about these fascinating sea slugs that live in all the world's oceans.
What Are Sharks?
What are sharks? This article covers the basics on sharks, including shark anatomy, how sharks are classified, where they live, and what they eat.
10 Basic Whale Facts
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.
How to Prevent a Shark Attack
Tips for avoiding a shark attack and what to do if a shark attacks. Learn about the risk of shark attacks and tips for swimming in areas inhabited by sharks.
What is the Biggest Animal in the Ocean?
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.
Facts About the Blue Whale
The blue whale is the largest animal in the world. Learn where blue whales live, what they eat, how they reproduce, and how many are left in the world.
How Marine Species Survive in the Ocean
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.
What Are Plankton?
class="no-js" itemscope itemtype="http://schema.org/Article" > itemprop="description" >Definition: "Plankton"
Fast Facts About Starfish and Sea Stars
Information about starfish, including facts about starfish species, images, starfish habitat, feeding and reproduction.
Learn About Different Speciesof 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.
How Are Pearls Made?
Learn how pearls form, including species that make pearls.
What is an 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.
Watching Whales from Shore On Cape Cod
Learn about whale watching from shore on the coast of Cape Cod, focusing on whale watching from Provincetown, Massachusetts. See whales from shore in the spring from Cape Cod, MA. Learn viewing tips and what to bring.
10 Easy Ways You Can Help 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.
What You Should Know About Sea Turtles
Sea turtles are reptiles that live in a marine or brackish environment. Learn about sea turtle reproduction, distribution, classification and conservation status.
Conchs
Conchs are a type of sea snail, and are also a popular seafood in some areas. The term 'conch' (pronounced
What Is the Largest Jellyfish?
What is the largest jellyfish? Learn about the largest jellyfish, where it is found, and whether it is dangerous to humans.
What Is a Marine Biologist?
Learn the definition of the term marine biologist. Learn where marine biologists work, what they do, how to become a marine biologist, and what marine biologists get paid.
Sharks - Questions and Answers About Sharks
Learn about sharks through this round-up of shark questions and answers, including how fast can a shark swim, what is the largest shark, and more.
9 Whale Watching Tips
Whale watching - seeing some of the largest animals on Earth - can be a thrilling activity. Being prepared for your whale watch and knowing what to expect can help make your trip a successful one. Following these tips will help you get the most out of your experience.
What to Expect When Visiting Clearwater Marine...
Review of Clearwater Marine Aquarium in Clearwater, FL, the home of Winter the dolphin and her friend Hope, and a number of other rescued dolphins, sea turtles and other marine life. Learn what to expect at Clearwater Marine Aquarium, a rescue and rehabilitation facility.
Green Sea Turtles: How They Got Their Name, and...
Facts about the green sea turtle, including information on the green turtle's natural history, reproduction, distribution and conservation.
What to Know About 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.
Skates (the Fish, not the Footwear)
Learn about the type of marine life called skates. Where do skates live? How do they eat and reproduce? Find out more by reading this marine life profile of skates.
Facts About Great White Sharks
Facts about the white shark, commonly called the great white shark. Learn how to identify a white shark, where white sharks live, and what they eat.
What to Know About 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.
What Are Protists?
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.
Dolphins Are Whales, and More Fun Facts
What is a dolphin? Learn about dolphins, including how many species of dolphins there are, and characteristics of dolphins.
What Is a Bony Fish?
description and characteristics of bony fish - marine life overview
What Are the Differences Between Baleen and...
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.
The Ins and Outs of Sea Star Anatomy
Here you can learn more about the characteristics of sea stars, and major points of their anatomy.
Fascinating Facts About Whale Sharks
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
Sea Turtle Pictures - Photos of Sea Turtles
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.
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.
Class Gastropoda - Snails, Sea Slugs, Sea Hares
The Class Gastropoda includes snails, slugs, limpets and sea hairs - all animals referred to as 'gastropods.' Learn about gastropods and see some examples here.
Placoid Scales
Read about the meaning of placoid scales and how they differ from the scales of bony fish. Know the alternative name for these scales.
Mollusk 101
Learn about the Phylum Mollusca - the mollusks.
Why Do Lobsters Turn Red When Cooked?
Lobsters are usually a brownish-green in the wild. What happens between the sea and the dinner table to turn them bright red?
Thresher Sharks
Learn about thresher sharks, including the 3 species of thresher sharks (bigeye thresher, common thresher, and pelagic thresher), and thresher shark feeding, habitat, reproduction, distribution and conservation status.
10 Awesome Facts About Sea Otters
Learn 10 fascinating facts about sea otters.
What Is 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.
Where Do Polar Bears Live?
Where do polar bears live? Find out more.
Where Do Killer Whales Live?
Learn about the distribution of killer whales (orcas), and where you could see killer whales.
Fascinating Facts About Fin Whales
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.
What Is the Largest Fish?
What is the largest fish? Learn about the largest fish in the world.
Fun Facts About Basking Sharks
Facts about basking sharks, a large shark species that feeds on plankton. Learn about basking shark identification, diet, and distribution.
Sea Star Regenerating Arms
Sea Star Regenerating Three Arms. Page 6.
Leatherback Sea Turtle Facts
Learn 5 facts about the leatherback turtle - the largest sea turtle.
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.
What Is a Starfish?
What is a starfish? Learn about starfish, or sea stars.
Fun Facts About Lion's Mane Jellyfish
Lion's mane jellyfish are beautiful, but an encounter with them can be painful. Learn how to identify a lion's mane jellyfish and how to avoid them.
Dolphin Facts
Dolphin information - learn about dolphins through 10 fascinating facts.
What Eats Sea Turtles?
Sea turtles have shells to protect them, right? So what would eat a sea turtle? A sea turtle's shell only goes so far to protect them. Unlike land turtles,
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.
Baleen - What is 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.
What Do Sea Otters Eat?
What do sea otters eat? Learn the answer here.
Class Reptilia
The Class Reptilia refers to the reptiles - a diverse group of animals that are "cold-blooded" and have
The Ocean
Almost three-quarters of the Earth is ocean. Here you can learn facts about the ocean, about the major oceans of the world, and what the ocean is like as a marine life habitat.
How Do Marine Animals Sleep?
Sleeping in the ocean is definitely different than sleeping on land, and the more we learn about sleep in marine life, we're learning that they don't have the same requirements for long periods of undisturbed rest like we do. Here you can learn more about how different types of marine animals sleep.
Cetaceans - Whales, Dolphins and Porpoises
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.
Starfish (Sea Stars)
Starfish, or sea stars, are star-shaped animals that are a variety of shapes, sizes and colors. You might be most familiar with the starfish that live in tide pools in the intertidal zone, but some starfish live in deep water. Learn about sea star classification, reproduction and feeding here.
Guide to Jellyfish and Jelly-Like Animals
Identification guide to commonly-seen jellyfish and jelly-like animals with facts, images and information about stings.
Munching Manatees
Manatees are herbivores, feeding primarily on aquatic plants. Learn about the types of food manatees eat.
Do Whales Drink Seawater?
Do whales drink sea water? Learn more about how whales get their liquids in this article.
10 Fascinating Facts About Polar Bears
Learn 10 fascinating facts about polar bears, illustrated with images.
Basking Shark (Cetorhinus maximus) Migration
Shark scientists have questioned basking shark migration for decades. An an article in 1954 proposed that basking sharks hibernated on the ocean bottom during the winter, as shark sightings were scarce once cold weather hit. Tagging studies on sharks have revealed new information on at least one population of basking sharks.
What Is a Mangrove Habitat?
Learn the definition of mangroves and mangrove swamps, where mangroves are located, and marine species you can find in mangroves.
Scalloped Bonnethead Shark (Sphyrna corona)
Learn about the scalloped bonnethead shark, one of the 9 species of hammerhead sharks.
Blue Whale Facts
Learn about the blue whale - the largest creature on the planet. Facts about blue whales include the blue whale's size, diet and conservation status.
The Importance of Intertidal Zones
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.
Gastropod Facts
Gastropods are animals in the Class Gastropoda - the group of organisms that includes snails, slugs, limpets and sea hares. There are over 40,000 species in this class. Envision a sea shell, and you're thinking about a gastropod, although this class contains many shell-less animals as well. Here is a round-up of information on gastropods, including their taxonomy, feeding, reproduction and examples of gastropod species.
Killer Whale or Orca (Orcinus orca)
The killer whale, also known as the orca
Facts About Winter, the Bottlenose Dolphin
Learn about Winter, the bottlenose dolphin with the artificial tail. Winter is a bottlenose dolphin that lives at the Clearwater Marine Aquarium in Florida, and stars in Dolphin Tale.
Great Hammerhead Shark (Sphyrna mokarran)
Learn about the great hammerhead shark - the largest of the 9 hammerhead shark species.
How Oil Spills Destroy Marine Life
Many people became familiar with the disastrous effects of oil spills in 1989 after the Exxon Valdez incident in Prince William Sound, Alaska. That spill is considered the worst oil spill in U.S. history -- although the 2010 BP leak in the Gulf of Mexico could prove to be even worse. Overall, the effects of an oil spill on marine life depend on a variety of factors, but can include hypothermia, poisoning, increased predation and other stressors, as well as effects on marine habitat.
Corals and Coral Reefs
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.
How Do Crabs Breathe?
Have you ever wondered how crabs breathe? Did you know that some crabs can breathe underwater, but others cannot? Here you can learn more about crab respiration.
Humpback Whale Tail Fluke
Humpback Whale (Megaptera novaeangliae) Picture. Page 5.
Jellyfish: What You Should Know
Information about jellyfish. Learn about jellyfish facts, life cycles, where jellyfish are found and types of jellyfish.
Types of Toothed Whales
Learn about the diverse group of whales known as the toothed whales, which includes the dolphins and porpoises. Click through to profiles of each species to learn even more.
Mollusk
A mollusk is an animal classified in the Phylum Mollusca. Here you can learn more about mollusks and find examples of mollusks.
Porpoise Species
Here is a list of porpoise species - learn more about the 7 porpoise species with facts about each.
Bull Shark (Carcharhinus leucas)
Bull sharks are one of the top three species of sharks that attack humans. They tend to live in warm, shallow waters, close to shore. They have stout gray bodies, small eyes, and large fins. Here you can learn facts about bull sharks, including where they live, how they reproduce, and what they eat.
Loggerhead Turtle
Facts about the loggerhead sea turtle, including information on the loggerhead turtle's natural history, reproduction, distribution and conservation. The loggerhead sea turtle (Caretta caretta) weighs up to 400 pounds and has a reddish-brown carapace.
Facts About Humpback Whales
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.
What Is a Mermaid's Purse?
Have you found a 'mermaid's purse' on the beach? Learn what these unique structures really are, and even how your finding can contribute to science.
What Is Kelp?
Learn about the characteristics of kelp, and its importance. including examples and links to further reading, with our expert guide to marine life.
Learn the 14 Baleen Whale Species
Learn about the 14 species of baleen whales,and click through to species profiles and images.
Leatherback Sea Turtle (Dermochelys coriacea)
The leatherback turtle is a in a class of its own. Rather, it is in its own family. Out of the 7 species of sea turtles, the leatherback is the only one in the family Dermochelys. This is the largest sea turtle, and could also dive alongside some of the deepest-diving whales.
10 Facts About Cuttlefish
Facts about cuttlefish, a cephalopod that lives in tropical and temperate waters and has amazing camouflage abilities.
Fascinating Facts About Bonnethead Sharks
Learn about the bonnethead shark, including where it lives, what it eats and how it reproduces.
10 Facts to Learn About Manatees
Learn about manatees, also known as sea cows, through these fascinating facts.
Blue Button Jelly (Porpita porpita)
Information about the blue button jelly, which is not really a jellyfish, but a hydroid. Learn where blue button jellies are found, what they eat, how they reproduce, and if they're dangerous to humans.
The Deep Sea - Benthic and Abyssal Zones
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. 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. Learn more about what is considered the deep sea, how deep the deepest part of the ocean is, and what challenges marine life face in the deep sea.
Aristotle's Lantern
Definition of Aristotle's lantern, a term used to refer to the mouth of sea urchins and sand dollars.
Where Do Whales Migrate?
In this article, you can learn about whale migration. Find out which whales migrate and the longest distance a whale has migrated.
What Is a Mantle?
The mantle is an important part of the body of a mollusk. It forms the outer wall of the mollusk's body and encloses the mollusk's visceral mass (internal organs), and secretes calcium carbonate to form the mollusk's shell.
Whales
Learn about whales - what are they, how many kinds of whales are there, and other facts about whales.
How Phylums Are Used to Classify Organisms
Learn the definition of the word phylum, including a list of marine phyla with examples.
What is a Pinniped?
Pinnipeds are found all over the world and are a diverse group of marine mammals. The pinnipeds are in the order Carnivora and infraorder Pinnipedia, and includes all the seals, sea lions and the walrus.
How Salty is the Ocean?
How salty is the ocean? Learn about how much salt is in the ocean.
Apex Predator
An apex predator is an animal who, as an adult, has no natural predators in its ecosystem. The great white shark is an example of an apex predator. Apex predators play an important role in keeping ecosystems in check. Learn more about apex predators and why they are important.
Right Whale (Eubalaena Glacialis) Poop
Image of right whale (Eubalaena glacialis) poop. Page 10.

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