Redtoothed Triggerfish, Odonus niger. Picture taken on the island of Fihalhohi in the Maldives.
This work has been released into the public domain by its author, janderk.
Source: https://commons.wikimedia.org/wiki/File:Redtoothed_triggerfish.jpg

Redtoothed triggerfish (Odonus niger) also known as the Red-toothed triggerfish is a triggerfish of the tropical Indo-Pacific area, the sole member of its genus. Order: Tetraodontiformes, Family: Balistidae.