goosefish (any fish of family Lophiidae); monkfish; (arch.) fool; curved gutter
football fish (any fish of family Himantolophidae, esp. the Atlantic footballfish, Himantolophus groenlandicus)
sumo wrestler with a big belly
triplewart seadevil (Cryptopsaras couesii)
frogfish (any fish of family Antennariidae, esp. the striated frogfish, Antennarius striatus)
toadfish (any fish of family Batrachoididae, esp. the Pacuma toadfish, Batrachoides surinamensis)