David Fleetham / Bullethead parrotfish (Chlorurus spilurus) male, in terminal phase, over reef. Pacific Ocean, Hawaii.

Alex Mustard / Colourful coral reef wall, with orange scalefin anthias (Pseudanthias squamipinnis) swarming over red, orange and pink soft corals (Dendronephthya sp.) in a current, with a lone bullethead parrotfish...