SEAURCHIN

Sea urchin

Sea urchins or urchins, sometimes called sea hedgehogs, are small, spiny, globular animals which, with their close kin, such as sand dollars, constitute the class Echinoidea of the echinoderm phylum. There are c. 950 species of echinoids inhabiting all oceans from the intertidal to 5000 meters deep. Their shell, or "test", is round and spiny, typically from across. Common colors include black and dull shades of green, olive, brown, purple, blue, and red. They move slowly, feeding mostly on algae. Sea otters, Sea stars, wolf eels, triggerfish, and other predators feed on them. Their roe is a delicacy in ...

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sea urchin

Noun

  1. Any of many marine echinoderms, of the class Echinoidea, commonly found in shallow water, having a complex chewing structure named Aristotle's lantern.


The above text is a snippet from Wiktionary: sea urchin
and as such is available under the Creative Commons Attribution/Share-Alike License.

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