pl. (see fish) -·fish·, -·fish·es
any aquatic animal with a shell, esp. an edible animal such as the clam or lobster
Origin of shellfishMiddle English shellfyssche ; from Old English scilfisc ; from sciel, shell + fisc, fish
nounpl. shellfish or shell·fish·es
- Any of various edible aquatic invertebrate animals having a shell, especially mollusks such as clams and oysters, and crustaceans such as lobsters, crabs, and shrimp.
- An edible mollusk, in contrast to a crustacean: regulations concerning fish, crustaceans, and shellfish.
- The edible flesh of such animals.
(plural shellfish or shellfishes)