---
title: Titan Triggerfish (Balistoides viridescens)
scientific_name: Balistoides viridescens
common_name: Titan Triggerfish
taxon: Triggerfishes
conservation_status: LC - Least Concern
published: 2024-01-01T21:17:08.026Z
updated: 2026-08-11T21:10:25.625Z
tags: Titan Triggerfish, Balistoides viridescens, Triggerfishes, Red Sea, Marine Life, Diving
url: https://redseacreatures.com/taxon/fishes/bony-fishes/triggerfishes/titan-triggerfish
---

# Titan Triggerfish (*Balistoides viridescens*)

## Quick facts

- **Group:** Triggerfishes (*Balistidae*)
- **Size:** 75 cm
- **Depth:** 1-60 m
- **Diet:** Carnivore
- **Activity:** Diurnal
- **Rarity:** Common
- **Habitat:** Reef slopes, lagoons and sandy patches, nesting in craters in sand
- **Reproduction:** Egg layer, Gonochoric
- **Hazard:** Dangerous, Poisonous
- **Conservation status:** LC - Least Concern

## How to recognise it

- heavy diamond-shaped body, each scale outlined like a tile
- dark moustache line above the mouth
- small eyes set high, swiveling independently
- nests in a crater in sand and will approach a diver

The largest triggerfish on the reef at 75 cm (30 in): a heavy diamond-shaped body in olive and dark green, each scale outlined so the fish looks tiled, with a dark moustache line above the mouth and small high-set eyes it can swivel independently.

The teeth are the point. Eight heavy incisors in each jaw crush sea urchins, coral and thick-shelled molluscs, and the fish routinely picks up rocks and flips them to get at what is underneath. Smaller fish follow it around all day to take what the excavation exposes.

A nesting female will attack a diver, and knowing the shape of her territory is the difference between an incident and a non-event. The nest is a shallow crater in sand, and the territory she defends rises above it as a cone that widens toward the surface - so swimming upward keeps you inside it, and swimming up and away puts you further in, not further out. Get out sideways, staying low, keeping the fish in sight. Fins between yourself and the fish is the standard advice, and it is standard because those teeth go through a fin and a foot.

The trigger of the name is mechanical: the first dorsal spine locks upright and can only be released by a second, smaller spine behind it, letting the fish jam itself into a hole so tightly that nothing can pull it out.

## Also known as

- **English:** titan triggerfish, Black-lipped Triggerfish, Blue-finned Triggerfish
- **French:** Baliste à tête jaune, Baliste olivâtre, Baliste titan
- **Italian:** Pesce balestra titano
- **German:** Grüner Riesendrückerfisch, Riesen-Drückerfisch
- **Spanish:** Ballesta Bicolor Gigante
- **Portuguese:** Cangulo-titã
- **Dutch:** Blauwvintrekkervis
- **Polish:** Rogatnica zielonkawa
- **Czech:** ostenec zelenavý
- **Japanese:** ゴマモンガラ, Gomamongara
- **Chinese:** 剝皮魚, 綠擬鱗魨, 绿拟鳞鲀
- **Russian:** Синеперый балистод
- **CA:** Peix ballesta olivaci, Ballesta titani
- **DA:** Titanaftrækkerfisk
- **DIV:** މާ ރޮނޑު
- **FIJ:** Cumu
- **GL:** Peixe porco titán
- **HU:** Óriás íjhal
- **MAH:** Liele
- **MSA:** Ayam laut, Jebong
- **TAH:** 'o'iri pa'o
- **TGL:** Pakoy, Papakol
- **TH:** ปลาวัวหน้าลาย, ปลาวัวอำมหิต, ปลาวัวไททัน

## Scientific synonyms

- *Balistapus viridescens* (Bloch & Schneider, 1801)
- *Balistes brasiliensis* Bloch & Schneider, 1801
- *Balistes nigromarginatus* (Tanaka, 1908)
- *Balistes viridescens* Bloch & Schneider, 1801
- *Balistoides veridescens* (Bloch & Schneider, 1801)
- *Pachynathus nigromarginatus* Tanaka, 1908
- *Pseudobalistes viridescens* (Bloch & Schneider, 1801)

## Range

Federal Republic of Somalia, Indian Ocean, Kenya, Mozambique, Red Sea, Republic of Mauritius, Seychelles, Western Indian Ocean

---

*Source: [Red Sea Creatures](https://redseacreatures.com/taxon/fishes/bony-fishes/triggerfishes/titan-triggerfish)*
*Updated: August 11, 2026*