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Reference Terms
from Wikipedia, the free encyclopedia

Crab

The term crab is often applied to several different groups of short (nose to tail) decapod crustaceans with thick exoskeletons, but only members of the Brachyura are true crabs; other taxa, such as hermit crabs, porcelain crabs, king crabs, and horseshoe crabs are, despite superficial similarities, not crabs at all.

Note:The above text is excerpted from the Wikipedia article "Crab", which has been released under theGNU Free Documentation License.
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