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sea urchin
(redirected from Echinoidea)

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sea urchin

Any of various orders of the class Echinoidea among the echinoderms. They all have a globular body enclosed with plates of lime and covered with spines. Sometimes the spines are anchoring organs, and they also assist in locomotion. Sea urchins feed on seaweed and the animals frequenting them, and some are edible, as is their roe.



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? Mentioned in ? References in periodicals archive
 
An echinoderm of the class Echinoidea, which includes the sand dollars and sea urchins.
Anchovies and olives are just the start in creative menu by The Seattle Times (Seattle, WA)
the same members of the Echinoidea class that otters are known for gobbling in vast quantities.
SEA OTTER SIGHTING RAISES STIR, QUESTIONS by The Register-Guard (Eugene, OR)
An echinoderm of the class Echinoidea, which includes the sand dollars and sea urchins.
Natural wonders by guardian.co.uk / guardian.co.uk
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