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Crab (view source)

Revision as of 21:22, April 20, 2007

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'''Crabs''' are a large family of decapod [[crustacean]]s. There are hundreds of species, mainly marine, although freshwater species such as the Chinese mitten crab, and land-dwelling species such as the robber crab (which climbs [[coconut]] trees to feed on the nuts), also exist.
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The [[Alaska]]n king crab is the heaviest species of crab, but the [[Japan]]ese spider crab has much longer legs, sometimes spanning ten feet or more. The smallest species of crabs are the pea crabs, that live as [[commensal]]s inside the shells of many [[bivalve]] [[mollusc]]s.
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Crabs are typically omnivorous, feding primarily on [[algae]], but happy to scavenge or capture live prey when available. Crabs are themselves the common prey of many marine organisms, including [[cod]], [[cuttlefish]] and [[octopus]]es.
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Crabs are an important fishery in many parts of the world.
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=== Disambiguation ===
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A number of other organisms also go by the name of crab:
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*The [[horseshoe crab]], ''Limulus'', is not actually a crab, or even a crustacean.
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*Likewise, crab spiders, which are [[spider]]s, should not be confused with spider crabs, which are crabs.
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*Sufferers from 'crabs' are in fact suffering from an infestation of pubic [[lice]].
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*The small trees and their fruit, called [[crab apples]], are entirely unrelated.
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[[Category:Crustaceans]]
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