Pinktail Triggerfish

Pinktail Triggerfish

The Pinktail Triggerfish (Melichthys vidua) is a strikingly elegant trigger — a deep olive-to-black body offset by crisp white dorsal and anal fins and a soft pink, lyre-shaped tail. Hardy and relatively even-tempered for the family, it is one of the better-behaved triggerfish and, with appropriate caution, one of the more reef-tolerant. Its clean colours and graceful swimming make it a handsome choice for a larger marine aquarium.

It eats more algae and less hard-shelled prey than many triggers, which contributes to its comparatively mild reputation.

Natural Habitat & Origin

Melichthys vidua is widespread across the Indo-Pacific, where it lives on outer reef slopes and channels, feeding on a mixed diet of algae, detritus and small invertebrates. It shelters in holes and crevices, wedging itself in with its trigger spine when threatened.

In the aquarium it wants substantial rockwork with caves to retreat into, plus open swimming space to patrol.

Care Requirements

Maintain stable marine conditions: salinity around 1.024–1.026, pH 8.1–8.4, and a temperature of about 24–26°C (75–79°F), with good flow. Reaching about 35 cm (14 inches), it needs a large tank of around 450 litres (about 120 US gallons) or more with secure rockwork it cannot easily topple. It is hardy and long-lived given good water quality.

Diet & Feeding

The Pinktail Triggerfish is an omnivore with a notable herbivorous component, feeding on algae and detritus as well as small invertebrates. Offer a varied diet of meaty marine foods — frozen mysis, krill and chopped seafood — alongside marine algae and herbivore preparations, with some hard-shelled items to help wear its teeth. Feed once or twice a day; it is a hearty feeder.

Behavior & Temperament

This is one of the milder triggerfish, generally peaceful when young, though it can become more territorial with age and is best treated as semi-aggressive. Keep it with robust tankmates and provide enough space and rockwork to reduce conflict. It is less destructive than many triggers but still strong enough to rearrange loose rock.

Tank Mates

Suitable companions are other robust marine fish — tangs, large wrasses, angelfish and other moderately assertive species — that can hold their own. Avoid small, timid fish. It is reef-tolerant with caution: it largely ignores corals but may nip ornamental shrimp, crabs and other small mobile invertebrates, so keep it only in robust reefs without prized small invertebrates, or in fish-only systems.

Breeding

Melichthys vidua is a pelagic spawner and is not bred in the home aquarium; trade specimens are wild-collected.

Common Health Issues

The Pinktail Triggerfish is hardy but, like all marine fish, can be affected by marine ich (Cryptocaryon irritans) and marine velvet (Amyloodinium ocellatum), particularly when stressed. Quarantine new arrivals, keep water quality stable, and provide secure rockwork. Given the space it needs and a varied diet, it is one of the easiest, most elegant and most reef-tolerant triggers for an intermediate marine keeper.