The body depth of the species ranges from 2.9 to 3.4 times the standard length (SL) for specimens measuring 13–62 cm SL. The preopercle has 3–7 enlarged serrae at the angle, and the upper edge of the operculum is distinctly convex. The anal fin consists of 3 spines and 8 soft rays. There are 17–19 rays in the pectoral fin. In large adults, the caudal fin is truncate, while in juveniles, the rear margin is convex. The lateral body scales are smooth. Juveniles measuring less than 20 cm standard length exhibit two broad longitudinal, black-edged whitish bands that disappear in adults. The head and body of large adults are uniformly grey with dark lines breaking into dashes and spots.