Shrimps,Lobsters,and CrabsWith around 10,000 species, the deca-pods
(the term means “ten legs”) are thelargest group of crustaceans. They in-clude the shrimps, lobsters, and crabs.Decapods are also the largest crustaceansin size. Many are prized as food and areof great commercial importance.Decapods feature five pairs of walk-ing legs, the first of which is heavier andusually has claws used for feeding and de-fense (Fig. 7.32). The carapace is well de- veloped and encloses the part of the body