Black Triggerfish

Description:

The black triggerfish or black durgon (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 (wikipedia)

Habitat:

This species is found in open waters, shallows, and exposed reefs, 5–35 metres (16–115 feet) Seems to prefer inland/shores in the Ascension island region where they are strangely prolific.

Notes:

Caw on reefs off the coast of Maui