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Definition of shellfish noun from the Oxford Advanced Learner's Dictionary

picture of a clam

shellfish

noun

shellfish pronunciation English

ˈʃelfɪʃ

shellfish pronunciation American

ˈʃelfɪʃ

plural shellfish

a creature with a shell, that lives in water, especially one of the types that can be eaten. Oysters and crabs are both shellfish.

compare crustacean, mollusc