This shot of a Clarion angelfish was taken at Roco Partida Island.  Roca Partida is in the Revillagigedo Islands, which are located off the western coast of Mexico. 
Clarion angelfish play an important role in their habitat, especially around the Revillagigedo Islands. They are often seen cleaning large fish like manta rays and scalloped hammerheads of parasites and dead skin.