Appearance
The red grouper has a body with a standard length which is 2.6 to 3 times as long as it is deep. The preopercle is subangular with the serrations at its angle being slightly enlarged and the upper edge of the gill cover is straight. The gill cover has three flat spines with the central spine being the longest. The dorsal fin contains 11 spines and 16 or 17 soft rays while the anal fin has three spines and eight soft rays. The pectoral fins are longer than the pelvic fins and the caudal fin is truncate. The pelvic fins insert posterior to the insertion site of the pectoral fins. Red grouper are dark reddish brown on the upper part of the head and body, shading to paler pink on the underparts. They are marked with lighter spots and blotches across their body and there are darker margins to the fins.

