Juvenile "Ocellated" Frogfish. There seems to be some confusion as to which species this is. Not A. ocellatus, which is from the Atlantic.
Anglerfishes are members of the teleost order Lophiiformes /ˌlɒfiːəˈfɔrmiːz/. They are bony fishes named for their characteristic mode of predation, in which a fleshy growth from the fish's head (the esca or illicium) acts as a lure.