Fiddler Crab

The fiddler crab or calling crab is any of about a hundred species of semiterrestrial marine crabs in the family Ocypodidae, well known for their extreme sexual dimorphism: male crabs carry one major claw significantly larger than their minor claw, while females' claws are both the same size, and the name fiddler crab comes from the resemblance of the small and large claw together to a fiddle. Fiddler crabs are found along sea beaches and brackish intertidal mud flats, lagoons, swamps and other brackish or salt-water wetlands, and if a major claw is lost, a male will regenerate one on the same side after its next molt.