Tetrabrachiidae

Tetrabrachiinae, or the four-armed frogfishes or doublefin frogfishes, is a small subfamily of marine ray-finned fishes belonging to the family Antennariidae in the order Lophiiformes, the anglerfishes.'''''' These fishes are found in relatively shallow waters of the eastern Indian Ocean and western Pacific Ocean.

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