Pinktail Triggerfish

Melichthys Vidua
Pinktail Triggerfish - Marinewise © 2026 MarineWise

Quick Facts

Scientific name Melichthys Vidua
Other names Paddlefin Triggerfish, Whitetailed Triggerfish
Size Up to 40 cm (16 in)
Weight Up to 1.5 kg (3.3 lb)

Distribution

Habitat & AU Distribution Coastal waters amongst seaward reefs rich with coral & invertebrate growth
Depth Range 5–50 m (16–164 ft)
Pinktail Triggerfish Distribution

Interesting Info

  • The Pinktail Triggerfish are found throughout the Indo-Pacific, including the Great Barrier Reef, Coral Sea, and reefs of northern Western Australia.
  • It gets its name from its eye-catching pink tail, which contrasts sharply against its dark, almost black body.
  • Their body is oval-shaped and deep, built for power and manoeuvrability among coral reefs.
  • They have small, bright blue-green lines running across their face and fins, which shine in sunlight, especially when viewed underwater.
  • Like all triggerfish, they have a unique locking spine on their dorsal fin that can be “triggered” upright to wedge themselves into reef crevices for protection.
  • Pinktail Triggerfish are omnivores, feeding on a wide range of prey: algae, sponges, sea urchins, crabs, molluscs, and even floating plankton. Their strong teeth can crush hard shells with ease.
  • Their habitat includes outer reef slopes, lagoons, and seaward reefs, usually at depths of 5–50 m (16–164 ft).
  • They are active daytime foragers, often swimming above the reef in small groups but darting back to cover if threatened.
  • While not aggressive toward people, males can become territorial when guarding nests, occasionally charging intruders to drive them away.
  • Breeding occurs in warmer months. Males establish and defend nesting territories on the reef floor, where females lay eggs that are aggressively guarded until hatching.
  • Lifespan is thought to be 8–10 years, similar to related triggerfish.
Species Interaction

Snorkelling & Diving, Aquariums, Recreational Fishing

The Pinktail Triggerfish is most often encountered by snorkellers and divers, who see them hovering above corals on tropical reefs. They are sometimes kept in large saltwater aquariums, though they require plenty of space and a mixed diet. Across parts of the Pacific, they are caught in small-scale, but in Australia they are not a targeted species and often caught as bycatch.

Scientific Classification

Kingdom: Animalia

Phylum: Chordata

Class: Actinopterygii

Order: Tetraodontiformes

Family: Balistidae

Genus: Melichthys

Species: Melichthys vidua

Conservation Status

The Pinktail Triggerfish is listed as Least Concern by the IUCN, thanks to its wide distribution and stable populations. Localised threats include overfishing for aquarium trade, subsistence harvest, and coral reef degradation, but overall the species is not at risk.

Fish Taste Quality

Pinktail Triggerfish are not eaten in Australia, and not recommended because of the risk of ciguatera poisoning. They are eaten in some Pacific regions but not a major food fish.

Taste Rating: 2/5

How to catch
Pinktail Triggerfish

Catch Difficulty: Easy

Tackle: Patternoster Rig, Running Sinker Rig

Bait: Crab, Fresh cut flesh baits, Octopus, Prawns, Shellfish, Squid, Worms

Technique: Keep bait close to the reef/structure

Popularity: Not targeted - Bycatch

Pinktail Triggerfish
As Aquarium Fish

Care Level: Moderate

Temperament: Peaceful

Diet: Omnivore

Reef Compatible: With caution

Minimum Tank Size: 150 gallons

Recreational Viewing
- Snorkeling & Scuba

Finding: Easy

Temperament: Peaceful

Location: Inner Reef, Outer Reef, Lagoon

Danger: None