Description

Also known as Lesson's Sweetlips, Lesson's Thicklip, Lined Sweetlips, Sweetlips.

Found singly, during the day, close to caves and ledges, of steep slopes, dispersing at night hunting for food, over outer reef lagoons.
They feed nocturnally on benthic invertebrates.
Juveniles in protected, shallow, lagoons, and reefs.
Length - 40cm
Depth - 1-35m
Widespread Western Pacific

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. (edit) Ref: https://www.fishbase.se/summary/Plectorhinchus-lessonii.html