Crab – An Introduction
Tuesday, July 25th, 2006Crab is a common name for any group of crustaceans characterized by a reduced abdomen and an enlarged and broadened anterior portion of the body. Only members of the Brachyura are true crabs. Other taxa, such as hermit crabs, porcelain crabs and king crabs are, despite superficial similarities, not crabs at all. Although most common as bottom dwellers in the sea, crabs also occur in fresh water, and some venture onto land. Crabs are divided into two groups: true crabs (about 4500 species) and hermit crabs and their allies (about 1400 species).
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