The titan triggerfish (Balistoides viridescens) is the largest of the triggerfish species and can grow up to 75 centimeters in length (30 inches). Endemic to the Maldives (and other reef areas in the Indo-Pacific region), the triggerfish is not a pelagic species and generally lives in the flat areas of the reef.
As you can see in this video, the titan triggerfish can be very aggressive towards scuba divers and snorkellers. The titan triggerfish, most notably during the reproduction season, can become extremely territorial, guarding its nest from all intruders and perceived aggressors. The titan triggerfish‘s nest is generally located in a flat, sandy area.
Due to its size and strong teeth, the titan triggerfish can inflict serious injury (bites may also be ciguatoxic.) The titan triggerfish does not always bite, but may aggressively swim at snorkellers and divers, encouraging them to leave their nesting area.
When the male titan triggerfish, which are the most colourful, start swimming in your direction, it is best to swim away backwards, kicking your fins as a defence. Failure to do so may result in being bitten. Prior to aggressive action, the fish will often roll onto its side, allowing it a better look at the intruder it perceives at threatening it or its eggs. Divers can look for the fish to perform this rolling action, and take it as a warning, allowing them time to retreat to a safe distance before the fish attacks.
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[...] aggressive. They can be quick to claim their own territory in the aquarium, and will not cease …Aggressive Titan Triggerfish | videosmaldives.comA violent titan triggerfish is seen defending its nest against curious scuba divers The titan [...]