crustacea
/krʌˈsteɪʃə/
noun
- A large group of mostly water-dwelling animals with a hard outer shell, jointed legs, and no backbone, such as crabs, lobsters, shrimp, and barnacles.
- Many crustacea, such as shrimp, are important sources of food for humans.
- The aquarium has a special tank for small crustacea found in tide pools.
- The biology class studied the anatomy of crustacea like crabs and lobsters.