Dibrachichthys is a monospecific genus belonging to the family Tetrabrachiidae, the four-armed frogfishes.

The only species in the genus is Dibrachichthys melanurus, the twoarm humpback anglerfish, which is found in the eastern Indian and western Pacific Oceans.

[2] The type locality of the new species was given as 11°06.9'S, 142°51.9'E, northeast of Ussher Point on the Cape York Peninsula in Queensland.

The specific name melanurus means "blacktail", and is a reference to the black bar on the base of the caudal fin.

The cranium is markedly wider than that of T. ocellatum and some of the skull bones form a horizontal tube-like structure to the front of each eye.