Titan Triggerfish

Balistoides Viridescens
Titan Triggerfish - Marinewise © 2026 MarineWise

Quick Facts

Scientific nameBalistoides Viridescens
Other namesBlacklipped Triggerfish, Bluefinned Triggerfish, Dotty Triggerfish, Giant Triggerfish, Moustache Triggerfish
SizeUp to 75 cm (29.52 in)
WeightUp to 13.5 kg (30 lb)
FamilyTriggerfish / Balistidae

Distribution

Habitat & AU DistributionCoastal waters, deep lagoons & seaward reefs amongst edges & slopes
Depth Range1–50 m (3–164 ft)
Titan Triggerfish Distribution
Species Interaction

Snorkelling & Diving

The Titan Triggerfish is a popular sight for divers on the Great Barrier Reef, but it demands respect. When calm, it can be observed foraging and blowing sand to uncover prey — a fascinating behaviour. During breeding, however, they are notorious for aggressive nest-guarding. Snorkellers and divers are advised to keep their distance and watch from the side, not above.

Scientific Classification

Kingdom: Animalia

Phylum: Chordata

Class: Actinopterygii

Order: Tetraodontiformes

Family: Balistidae

Genus: Balistoides

Species: Balistoides Viridescens

Conservation Status

The Titan Triggerfish is listed as Least Concern by the IUCN due to its wide distribution and stable populations. However, local threats such as reef degradation and overfishing in parts of Southeast Asia may affect numbers regionally.

Recreational Viewing
- Snorkeling & Scuba

Finding: Intermediate

Temperament: Semi-Aggressive

Location: Inner Reef, Outer Reef, Lagoon

Danger: None