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Sea Cucumber
Apr. 22, 2008
The sea cucumber is an echinoderm shaped like a cucumber or sausage, related to the starfish and the sea urchin. Learn more about the sea cucumber.
Sea Urchin
Apr. 22, 2008
The sea urchin is a prickly-looking echinoderm, spherical in shape and covered with long movable spines. Learn more about the sea urchin.
Starfish
Apr. 22, 2008
The starfish, or sea star, is a marine animal. Despite its name, the starfish is not a fish; it's an echinoderm, a type of animal that's spiny-skinned.
Brittle Star
Apr. 22, 2008
The brittle star is an echinoderm. Learn more about the brittle star at Animal Planet.
Echinoderms
Apr. 22, 2008
The echinoderm is a member of spiny-skinned marine animals, including starfish, sea urchins, and sea cucumbers. Learn more about echinoderms.
Sand Dollar
Apr. 22, 2008
The sand dollar is an echinoderm. Learn more about the sand dollar at Animal Planet.
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