shellfish

(-fis̸h′)

any aquatic animal with a shell, esp. an edible one, as the clam or lobster

Origin: ME shellfyssche < OE scilfisc < sciel, shell + fisc, fish

See shellfish in American Heritage Dictionary 4

noun pl. shellfish shellfish or shell·fish·es

An aquatic animal, such as a mollusk or crustacean, that has a shell or shell-like exoskeleton.

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