plural shellfish
: an animal (such as a crab or an oyster) that has a hard outer shell and that lives in water
lobsters, crabs, and other shellfish
a serving of shellfish
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“Shellfish.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/shellfish. Accessed 20 Jun. 2026.
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