Balistoides viridescens
Encounter Rate
Spotting Difficulty
Best Season
Year-round
Depth Range
1-40 meters
The titan triggerfish is the largest triggerfish species in Komodo and one of the reef's most infamously aggressive residents during nesting season. Reaching up to 75 centimetres in length, these powerfully built fish have a distinctive olive-green body with dark scale margins, a yellow-edged tail, and a dark mask-like marking across the face. They are impressive to watch while feeding, as they use their strong teeth and jaws to rearrange chunks of coral and rubble to uncover hidden invertebrates, creating distinctive crater-like excavations in the reef. However, titan triggerfish are best known among divers for their fierce nest-guarding behaviour. During nesting, they will aggressively charge and even bite divers who unwittingly swim into their cone-shaped defensive territory. Experienced Komodo dive guides always warn their groups about nesting titans and plan dive routes accordingly. Despite their reputation, outside of nesting season they are generally approachable and fascinating to observe as they methodically dismantle the reef surface in search of food.
Average Size
40-55cm
Size Range
20-75cm
Maximum Size
75cm
Feeds on sea urchins, coral, crabs, tube worms, molluscs, and other hard-shelled invertebrates. Uses powerful jaws to flip rocks and coral rubble, creating large feeding craters in the reef.
The titan triggerfish is the largest triggerfish species in Komodo and one of the reef's most infamously aggressive residents during nesting season. Reaching up to 75 centimetres in length, these powerfully built fish have a distinctive olive-green body with dark scale margins, a yellow-edged tail, and a dark mask-like marking across the face. They are impressive to watch while feeding, as they use their strong teeth and jaws to rearrange chunks of coral and rubble to uncover hidden invertebrates, creating distinctive crater-like excavations in the reef. However, titan triggerfish are best known among divers for their fierce nest-guarding behaviour. During nesting, they will aggressively charge and even bite divers who unwittingly swim into their cone-shaped defensive territory. Experienced Komodo dive guides always warn their groups about nesting titans and plan dive routes accordingly. Despite their reputation, outside of nesting season they are generally approachable and fascinating to observe as they methodically dismantle the reef surface in search of food.
This species plays an important role in the marine ecosystem of Komodo National Park. Responsible diving practices help protect these animals and their habitat for future generations.
No encounters shared yet
Be the first to share your sighting of this species!
Watch for warning signs: a titan hovering low over the reef floor and swimming aggressively toward you. Swim sideways and slightly down to exit the cone-shaped territory. Never swim upward as this takes you deeper into their defensive zone.
Answer a few questions and our team will point you towards the perfect match!
Start nowIt's free and takes 2 mins
