Reefcrest Parrotfish

Chlorurus frontalis has nine dorsal spines, ten dorsal soft rays, three anal spines and nine anal soft rays. Coloration changes slowly with growth. The light green patch on the caudal peduncle is present on individuals as small as 15 cm (5.9 in) and the distinctive tan facial markings are on most individuals above 20 cm (7.9 in). Large males develop a near-vertical forehead profile and long lobes and a well-developed lunate caudal fin. Unlike most parrotfish, C. frontalis does not display much sexual dichromatism; initial phase and terminal phase colouration are very similar.

The main habitat of this species is in north to the Ryukyu Islands to the Line and Ducie islands and south to the Great Barrier Reef, Pacific Ocean. This species is also found in Wake Island, Tonga, Tahiti, Solomon Island, Pitcairn Island, Samoa, Papua New Guinea, Northern Marianas, Marshall Islands, Palau, New Caledonia, Micronesia, French Polynesia, Kiribati, Palau, Guam, Cook Island, Australia, American Samoa, Taiwan, Vietnam, Japan, Philippines, Palau, Coral Sea, Kuroshio Current, Sulu Sea, Celebes Sea, South China Sea, Yellow Sea, and Tubbataha Reefs.

This species is monogamous and oviparous. They pair up distinctly during breeding.