Entirely olive-gray. Dorsal and anal fins are marbled. Caudal fin lobes elongate in large adults. One or more enlarged scales behind gill opening. 26 to 29 dorsal fin rays. 23 to 26 anal fin rays. Young fish have a large, darker saddle on back (these saddles sometime persist in adults). Blue spots and short blue lines in dorsal fin and on upper half of body, becoming white below anal fin. Upper rim of eye blue. The Gray Triggerfish has large incisor teeth and a deep laterally compressed body covered with tough, sandpaper-like skin. They have more than one dorsal spine. The first spine is large, and when erect it remains so until the smaller second spine is deflexed, triggering the first. The gray triggerfish is easily distinguished by its drab color from the queen triggerfish, which is vividly colored.