The black triggerfish, Melichthys niger, called Humuhumu’ele’ele in Hawaiian, is a blimp-shaped triggerfish with bright white lines running along its dorsal and anal fins. When in the water, it appears to be completely black. However, if it is taken out and exposed to bright light, one can see that it is actually of a dark-blue/green coloration.
Circumtropical. Hawaii, up through Polynesia, westward to the East Indies and across the Indian Ocean. The Black triggerfish is also located around the southern coast of Africa. (text source: wikipedia)