Difference between revisions of "Category:Sea Urchins"
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Latest revision as of 13:30, 16 March 2011
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Sea urchins or urchins are small, spiny, globular animals which, with their close kin, such as sand dollars, constitute the class Echinoidea of the echinoderm phylum. They inhabit all oceans. Their shell, or "test", is round and spiny, typically from 3-10cm (1.2-3.9") across. Common colors include black and dull shades of green, olive, brown, purple, and red. They move slowly, feeding mostly on algae.
Pages in category "Sea Urchins"
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Diadema setosum6642.jpg 138 KB
