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.
They feed on algae, crustaceans, invertebrates, molluscs, tunicates and worms.
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.
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