Large adults appear blue underwater and usually have a small black spot at the dorsal fin base. Juveniles have a large white saddle spot following the black spot (Ref. 48636). A moderately small but prominent dark spot present on body at base of last dorsal-fin spine (spot not extending onto fin membrane). Body scales each with a blue centre in life forming horizontal rows of spots on side. Second prominent anterior canine in lower jaw distinctly shorter than first in adults, directed mostly dorsally and slightly anteriorly. 3 to 5 scales on subopercle. (Ref 9823)