Black Triggerfish

Found singly or in loose schools, over outer reef crests, drop-offs, and slopes, of clear seaward reefs, around oceanic islands.
They feed on algae and zooplankton, sometimes high above the reef.

Triggerfish have a hard spine dorsal fin that can be locked.
When sleeping this spine is used to wedge them into place in a crevasse and so deter predators from pulling them out of their bed!
The spine is also held erect as a warning to other fish to stay away.
Several large Titans blow shallow depressions in the sand for nesting and if approached will raise this spine as a warning, if ignored they may charge, even divers! especially the Titan Triggerfish who will take a tasty bite. Beware.

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