Mostly found in muddied mangrove and salt marshes, the male Fiddler crabs are easily recognized by their distinctively asymmetric claws. They have one oversized claw called a cheliped that resembles a fiddle (violin), hence the name. That claw is waved around to attract females during courtship and used for defensive purposes against other male Fiddler crabs. There are many types of Fiddler crabs and this papercraft representation of it belongs to the uca arcuata subgnenus.
Endangered Animal Papercraft - Fiddler Crab [Konica Minolta]
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