Is the Blue Throat Triggerfish reef safe?

Yes, it is considered one of the most reef-safe triggerfish. Because it is naturally a planktivore, it generally leaves corals and most invertebrates alone, though very small ornamental shrimp might occasionally be at risk.

How do I tell males and females apart?

The species is sexually dimorphic. Males have a distinct blue patch on their throat and jaw, along with bright yellow margins on their dorsal, anal, and caudal fins. Females lack these features and are a uniform grey-brown.

Can I keep a male and female pair together?

Yes, maintaining a known male-female pair is highly successful and visually rewarding, provided the aquarium is large enough (475+ litres). It is best to introduce them simultaneously.

What should I feed them?

Their diet should focus on meaty marine fare such as Mysis shrimp, krill, enriched brine shrimp, and high-quality marine pellets. Feeding multiple small meals a day helps replicate their natural plankton-picking behaviour.

Why is my triggerfish hiding in the rocks all day?

Newly introduced triggerfish are often very shy and will wedge themselves tightly into crevices. Given a few days to acclimate to the lighting and water flow, they will become bold and active swimmers.

MarineMarineIntermediate

Blue Throat Triggerfish

Xanthichthys auromarginatus

The Blue Throat Triggerfish is a highly sought-after, generally reef-safe marine fish known for its striking sexual dimorphism and relatively peaceful nature.

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Ideal Conditions

Temperature: 22 – 26 °C
pH range: 8.1 – 8.4
Hardness: 8 – 12 dGH
Salinity: 1.02 – 1.025 SG
Adult size: 20 – 25 cm
125 gallons: 475 litres+
Lifespan: 8 – 12 years
Diet: Carnivore
Water flow: High
Preferred setup: Ample open swimming space with rockwork providing large crevices for hiding and sleeping.

About the Blue Throat Triggerfish

Belonging to the genus Xanthichthys, the Blue Throat Triggerfish is widely celebrated among aquarists as one of the few triggerfish species suitable for reef aquariums. Unlike its more pugnacious, benthic-feeding relatives, this species naturally plucks zooplankton from the water column. Its streamlined body and graceful swimming style make it a spectacular focal point for a large marine setup. A strong case of sexual dimorphism makes sexing straightforward, with males sporting the characteristic blue jaw patch and yellow fin margins.

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Where Blue Throat Triggerfish comes from

Native range

Indo-Pacific, Red Sea

Countries / regions

United States (Hawaii), Australia, Maldives, Indonesia

Habitat

Current-swept outer reef slopes and drop-offs.

Found at depths ranging from 8 to 150 metres, primarily hovering in the water column to feed on zooplankton.

Similar species

Crosshatch Triggerfish
Xanthichthys mento
Sargassum Triggerfish
Xanthichthys ringens
Pinktail Triggerfish
Melichthys vidua

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Yellow Tang
Zebrasoma flavescens
Large, active, and robust enough to hold their own, sharing similar requirements without direct competition.
Great
Emperor Angelfish
Pomacanthus imperator
Similarly sized and robust, providing a dynamic display in a large aquarium without excessive territorial overlap.
Great
Cleaner Shrimp
Lysmata amboinensis
While this trigger is largely reef-safe and planktivorous, small ornamental shrimp may occasionally be mistaken for a meal, especially if added after the triggerfish.
Compatible with caution
Firefish
Nemateleotris magnifica
Small and timid dartfish may feel intimidated by the large size and high activity level of the triggerfish.
Compatible with caution
Clown Triggerfish
Balistoides conspicillum
Highly aggressive triggerfish species will likely bully and outcompete the more docile Blue Throat Triggerfish.
Not recommended

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