A pinktail triggerfish (Melichthys vidua) playing it safe. This is a sub-adult phase, hence the unusal coloration.

A school of black durgeons (Melichthys niger) feeding in the sunlight high above the reef

A rare find in Maui--this is the beautiful Finescale triggerfish (Balistes polylepis). Easily the largest triggerfish you'll see in the Islands, they grow to almost 30" (this one is about 18".) Look close and you can see where the common name derives from...