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The fiddler crab or calling crab can be one of the hundred species of semiterrestrial marine crabs in the family Ocypodidae. [2] These crabs are well known for their extreme sexual dimorphism, where the male crabs have a major claw significantly larger than their minor claw, whilst females claws are both the same size. [3]
Gelasimus vomeris is a species of fiddler crab found in the southwest Pacific Ocean. In Australia, it is found in the east and north from Darwin to Sydney. [1]It is commonly known as the two-toned fiddler crab, orange-clawed fiddler crab or Southern calling fiddler crab, however the common name orange-clawed fiddler crab is also used for the fiddler crab Tubuca coarctata. [2]
[1] [2] [3] The common name of these crabs is either the compressed fiddler crab, [4] or the orange-clawed fiddler crab, [5] (although this name is also used for Gelasimus vomeris). They are found on tidal mud flats adjacent mangroves and muddy tidal creek and river banks.
Gelasimus vocans is a species of fiddler crab. [2] It is found across the Indo-Pacific from the Red Sea, Zanzibar and Madagascar to Indonesia and the central Pacific Ocean. [3] It lives in burrows up to 50 centimetres (20 in) deep. [3]
It prefers areas of lower salinity than other fiddler crabs, [3] and can be found in great numbers along the banks of tidal streams, even at distances greater than 50 km (31 mi) from the sea. [ 4 ] Minuca minax was formerly in the genus Uca , but in 2016 it was placed in the genus Minuca , a former subgenus of Uca .
Tubuca capricornis, the capricorn fiddler crab, [1] is a species of fiddler crab that is found in north west and northern Australia. [2] It was named after its occurrence near the Tropic of Capricorn . [ 3 ]
Leptuca helleri, commonly known as Heller's fiddler crab, is a species of fiddler crab endemic to the Galapagos Islands in the eastern Pacific Ocean. [ 1 ] Taxonomy
Paraleptuca crassipes or the thick-legged fiddler crab is a species of fiddler crab that lives in intertidal habitats distributed across the western Pacific Ocean. [ 1 ] Paraleptuca crassipes was formerly a member of the genus Uca , but in 2016 it was placed in the genus Paraleptuca , a former subgenus of Uca .