A crayfish or freshwater crustacean that is gray in color, often found in streams and rivers.
Compound word from gray plus fish, describing the color of certain crayfish species. Regional dialect term used in areas where crayfish are common, emphasizing their gray coloration.
Many creature names in English are just color plus animal—bluefish, blackbird, whitefish—this naming system helped people quickly ID what they'd caught before modern scientific names existed!
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