Hephaestus fuliginosus (Sooty Grunter)

From fishes of Australia:

A fairly large brownish-grey to sooty-black grunter with darker scale margins. Individuals may have golden blotches on the sides. Juveniles have a dark blotch on the anal and soft dorsal fins. The Sooty Grunter has a discontinuous lip fold on the underside of the lower jaw. Some large individuals develop fleshy 'blubbery' lips.