1) Beach burrower 2) Salt marsh sidewalker 
A fiddler crab, sometimes known as a calling crab, may be any of approximately 100 species of semi-terrestrial marine crabs which make up the genus Uca. As members of the family Ocypodidae, fiddler crabs are most closely related to the ghost crabs of the genus Ocypode. This entire group is composed of small crabs – the largest being slightly ove...
any of the approximately 65 species of the genus Uca (order Decapoda of the subphylum Crustacea). They are named `fiddler` because the male holds one ... [5 related articles]
The Fiddler Crab of Calling Crab (Gelasimus arcuatus) is a genus of crustacean of the order Decapoda, family Ocypodidae. It gets its name from the male's distinctive larger claw which it has the habit of holding up as though beckoning or calling and makes him look as though he is carrying a fiddle and bow. Fiddler Crabs are solitary, shore-living a...
[n] - burrowing crab of American coastal regions having one claw much enlarged in the male
noun burrowing crab of American coastal regions having one claw much enlarged in the male
any small, burrowing crab of the genus Uca, characterized by one greatly enlarged claw in the male.