Description: Characterized by dark blue to purplish blue overall color with pale blue margins; teeth red; strongly elevated anteriorly, second dorsal and anal fins; front of eye with deep groove; slightly convex dorsal profile of head, ventral profile strongly convex; upturned mouth, protruding chin; prolonged two upper teeth, visible when mouth is closed; around seven longitudinal rows of small spines on posterior half of body; lunate caudal fin, prolonged lobes in large adult (Ref. 90102).