Also known as Black Triggerfish, Bluebelly Sufflamen Trigger, Bluebelly Triggerfish, Flagtail Triggerfish, Golden-finned Triggerfish, Golden-lined Triggerfish, Halfmoon Trigger, Halfmoon Triggerfish, Halfmoon Picasso Fish, Haremic Triggerfish, White Rim Trigger, White Rim Triggerfish, Whitetail Trigger, Whitetail Triggerfish, White-tailed Triggerfish, Whitetip Sufflamen Trigger, Whitetip Trigger, Yellow-backed Triggerfish, Yellowstreak Triggerfish.
Found singly, over open bottoms scattered with coral and rubble on seaward reefs. Adults with distinctive tail fin pattern ending in a part-moon shaped white margin. Juveniles yellow on top and white from below eye level separated by black strip.
They feed on algae, crustaceans, invertebrates, molluscs, tunicates and worms.
Length - 22cm
Depth - 2-20m
Western Indian Ocean - Red Sea to Gulf of Oman
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/Sufflamen-albicaudatum.html