Tetrabrachium

Tetrabrachium ocellatum (four-armed frogfish) is a species of anglerfish, closely related to the true frogfishes. It is the only member of its genus.

Like the true frogfishes, it is a small fish, no more than 7 cm in length, with a flattened body and loose skin. It has prehensile pectoral fins, helping it to move along the seabed, and giving it its "four-armed" appearance. It lives in shallow waters, around 50 m depth, off the coasts of New Guinea, Indonesia, and Australia.