Crayfish is a freshwater crustacean, small to medium in size, with a distinctive hard exoskeleton and pincers. Often called a crawdad or crawfish in some regions, it lives in streams and ponds and is a popular freshwater seafood. The term also applies to similar crustaceans in some regions, though usage varies by dialect and species. (2–4 sentences, 50–80 words)
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