fiddler crab noun
: any of a genus (Uca) of burrowing crabs in which the male has one claw that is greatly enlarged
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fiddler crab noun (Concise Encyclopedia)
Any of about 65 species of decapods (genus Uca) whose males hold one claw, always much larger than the other, somewhat like a violin. Both claws of the female are relatively small. Fiddler crabs often live in large numbers on beaches in temperate to tropical regions of the world. They inhabit water-covered burrows up to about 1 ft (30 cm) deep and feed on algae and other organic matter. Common North American species (e.g., marsh fiddler, china-back fiddler) live all along the U.S. Atlantic coast. Brightly coloured, they range in body size from about 1 to 1.2 in. (2.5 to 3 cm).
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