Compressed Fiddler Crab

Tubuca coarctata is a species of fiddler crab found in the western Pacific ocean, including Japan, Taiwan, the Philippines, Indonesia, New Guinea and Australia (in Queensland and the Northern Territory). The common name of these crabs is either the compressed fiddler crab, or the orange-clawed fiddler crab, (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.