Dusky Rubberlip

Found singly, or in pairs, close to shelter during the day, out hunting for food at night, in coastal waters over reefs.
Juveniles found in shallow weedy areas.

In some areas of the world 'Grunts' are better known as 'Sweetlips' distinguished from other species by their very large rubbery lips.
'Grunts'because they "grunt," the grunting sound is produced by their flat teeth plates rubbing together and this is amplified by their air bladders.
Found either singly or in schools hovering or motionless over the reef during the day, becoming nocturnal predators.