Description

Also known as Black Triggerfish, Black-finned Triggerfish, Indian Ocean Durgon, Indian Trigger.

Found singly, around holes they dig for shelter, below coral bases, over seaward reef slopes, rich in coral growth.
They feed on algae, crustaceans, small invertebrates, and sponges.
Length - 24cm
Depth - 1-30m
Widespread Indian Ocean

Indian Triggerfish dig their shelters under solid objects by swimming sand away. This is done by putting their mouth against a solid object and swim like crazy, thereby creating a current that takes the sand away and making a little nest area.

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!!! Ref: https://www.fishbase.se/summary/7634