<BGSOUND src="crustaceans.wav"> crustaceans

crustaceans

noun

Major group of animals, including crabs, shrimps, prawns, lobsters and crayfish; invertebrate organisms whose members have a hard outer skeleton, and occurring in marine and fresh waters and on land; belonging to the phylum Crustacea; aquatic arthropods that typically have a body covered with a hard shell, including lobsters, shrimps, crabs, etc.