Corals & Jellies
Cnidarians such as jellyfish and corals have stinging cells called nematocysts. When touched they eject barbed threads tipped with poison. See more »
what's inside: marine life
Marine life includes an incredible and vibrant array of wild animals that live in the ocean. From tiny phytoplankton to massive blue whales, marine life is a vital source of food, energy and life for the entire planet.
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Crustaceans
There are more than 52,000 species of Crustaceans in the world which include popular marine animals like lobsters, crabs, shrimp, crayfish and barnacles. Smaller crustacean breathe through their bodies and larger ones breathe through gills. See more »
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Mollusks
Mollusks are members of the invertebrate phylum Mollusca and contain more than 100,000 species. Some mollusks have shells like clams and snails, while larger mollusks have no bones at all like the cuttlefish, squid and octopus. See more »
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Starfish & Related Organisms
Echinoderms are spiny marine animals such as starfish and sea urchins. Most echinoderms have small jaws, a water-vascular system and tube feet. See more »
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Other Marine Life
Learn about some of the some of the most bizzare marine life under the sea, such as Sea Squirts, sponges and even Sea Monkeys. See more »
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featured articles
How Jellyfish Work
Although jellyfish have been around for over 650 million years, they're still very mysterious. Learn the all about the fascinating jellyfish life cycle.
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videos: marine life
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How Octopuses Work
To elude predators, the octopus will change color in an instant and even alter its shape to look like other sea animals. Does its magic put the chameleon to shame?
Oceans and Marine Life
Oceans and marine life have a symbiotic relationship. Learn about the relationship between oceans and marine life here.
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