Ocean Triggerfish

An open-water triggerfish, unusual within its family for spending much of its time well off the reef in blue water, feeding on zooplankton and small fish rather than grazing invertebrates on the bottom. Territorial around nest sites on sand during the breeding season, when it will approach and even nip at divers who stray too close.

Open water off reef edges and drop-offs

Midwater plankton feeder; territorial and confrontational around nest sites