A large class of arthropods, typically having a hard exoskeleton, segmented body, and jointed limbs, including crabs, lobsters, shrimps, and barnacles.
The marine biologist studied the various crustaceans inhabiting the coral reef.
crustaceannoun
A member of a large class of arthropods, which includes animals such as crabs, lobsters, shrimps, and barnacles, typically having a hard exoskeleton and segmented body.
The marine biologist studied the various crustaceans inhabiting the coral reef.