[5] The juveniles have an overall colour of yellowish-orange on the body and fins; the body is marked with a number of blue vertical bars which fade and, eventually, disappear as the fish matures.

[3] The Clarion angelfish has a very limited range in the Eastern Pacific Ocean, being largely restricted to the Revillagigedo Islands of Mexico.

Vagrants have occasionally been reported from the southern tip of Baja California and the southeastern part of the Gulf of California, as well as Clipperton Island, a French territory.

[1] The Clarion angelfish is found in rocky reefs at depths of up to 30 metres (98 ft).

[4] The Clarion angelfish was first formally described in 1890 by the American ichthyologist Charles Henry Gilbert (1859-1928), with the type locality given as Clarion, Socorro and San Benedicto Islands in the Revillagigedo Islands, western Mexico.