short, length much less than body depth over pelvic base; predorsal contour
smoothly convex in subadults, becoming straighter and steeper with age (large
adult males often develop a pronounced nuchal hump, producing a concavity
over the orbit); prepelvic contour approximately straight, not so steep as predorsal;
greatest body depth at or near origin of dorsal. Mouth relatively small,
horizontal to slightly oblique; jaws approximately equal anteriorly. Ascending
process of premaxillary extending to above anterior margin of orbit. Frenum along
margin of lower lip generally weak or absent. Gill rakers well-spaced, short and
stout.