Chaunax, variously known as coffinfishes, gapers, or frogmouths, is a genus of marine ray-finned fishes.

[6] There are currently 29 recognized species in this genus:[7] Chaunax sea toads have a rotund, slightly laterally flattened body which tapers to a small rounded caudal fin.

There is a single visible dorsal spine, the illicium, which is relatively short, sits in an oval-shaped depression on the snout, and is tipped with a tuft of filaments, the esca, or lure.

The lateral line is open and runs from the caudal peduncle to the head, with obvious canals connecting to branches under the eye, on the chin, and along the lower flanks.

[14] Chaunax coffinfishes are only distantly related to the frogfishes of the family Antennariidae but have a similar lifestyle as ambush predators, luring prey to within striking distance of their large mouth with the illicium and esca, and using their pectoral and pelvic fins to walk along the bottom.