The humpback anglerfish or common black devil (Melanocetus johnsonii) is a deepsea anglerfish in the family Melanocetidae, found in tropical to temperate parts of all oceans at depths to 2,000 m (6,600 ft). Its length is up to 2.9 cm (1.1 in) for males and up to 18 cm (7.1 in) for females.