Difference between revisions of "Sea urchin"
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| − | + | '''Sea urchins''' are marine animals of the class Echinoidea, [[echinoderms]] that have a soft body enclosed in a round, symmetrical, calcareous shell covered with long spines. | |
[[Category:Echinoderms]] | [[Category:Echinoderms]] | ||
Revision as of 18:03, August 2, 2008
Sea urchins are marine animals of the class Echinoidea, echinoderms that have a soft body enclosed in a round, symmetrical, calcareous shell covered with long spines.