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 over two inches across. Fiddler crabs are found along sea beaches and brackish inter-tidal mud flats, lagoons...