Any of about 8,500 species of the order Decapoda, mainly marine, higher crustaceans, including crabs, lobsters, shrimps, and crayfish. They have 10 legs including the chelae (pincers), which are enlarged modified legs. The order Decapoda has been represeneted since the Permian or Triassic period.
Related category• ZOOLOGY
Home • About • Copyright © The Worlds of David Darling • Encyclopedia of Alternative Energy • Contact