Blue Jaw Triggerfish (Xanthichthys auromarginatus) saltwater aquarium fish

The female Blue Throat Triggerfish is an elegant saltwater fish with a soft gray to brown-gray body covered in fine iridescent blue spots. A vivid blue ring around the eye adds contrast to her understated coloration. Unlike the male, the female does not develop the namesake blue throat or the same pronounced yellow edging along the fins, giving her a more subtle, refined appearance.

Also known as the Bluejaw Triggerfish or Gilded Triggerfish, Xanthichthys auromarginatus is native to the Indo-Pacific, ranging from Mauritius through northern Australia to Hawaii and the Society Islands, north to southern Japan. It inhabits current-swept reef ledges and outer drop-offs, often swimming several feet above the bottom in loose groups. Adults can reach approximately 12 inches.

Unlike many bottom-feeding triggerfish, this species feeds primarily on zooplankton in open water. Its comparatively restrained behavior around corals makes it one of the more suitable triggerfish for a carefully managed reef aquarium, although small ornamental invertebrates may still be at risk. It is equally impressive in a large fish-only aquarium.

Provide a mature aquarium with a long swimming footprint and extensive open water through the middle and upper portions of the display. Position live rock primarily along the back and sides, creating large caves, overhangs, and secure crevices without restricting the main swimming lanes.

Strong, varied water movement and excellent oxygenation suit this current-associated species. Efficient filtration and protein skimming are important because a full-grown triggerfish requires frequent, substantial feeding and produces considerable waste.

Rockwork should be stable and large enough to provide a secure nighttime retreat. Triggerfish can raise and lock their first dorsal spine inside a crevice, making them difficult for predators—or aquarists—to remove. Use a secure lid or mesh cover, as newly introduced or startled specimens may jump.

A female can be maintained alone, but a male-female pair requires a substantially larger aquarium with additional open swimming room and multiple retreats.

The adult minimum is 180 gallons. Evaluate the usable footprint as well as the gallon rating: the fish must be able to turn, reach a resting place, and pass companions without repeated close contact.

Leave access around the base of the aquascape for removing food fragments. Support heavy rocks securely before adding loose substrate, and retain more than one route between shelter and open water.

The Blue Throat Triggerfish is primarily a zooplanktivore in nature, forming loose aggregations above current-swept reef slopes while feeding heavily on drifting copepods and other planktonic prey.

Offer a varied carnivorous diet that includes mysis shrimp, enriched brine shrimp, krill, chopped clam, mussel, squid, shrimp, scallop, and quality frozen marine blends. Slow-sinking carnivore pellets can also be included once the fish is accustomed to prepared foods.

Feed two or three moderate portions daily. Allow some food to drift through the water column to support its natural feeding behavior. Occasional hard-shelled marine foods may help provide feeding enrichment and natural tooth wear, but freshwater feeder fish should not be used.

Use a rotation of accepted foods rather than one item as the entire diet. Practical options include:

Mysis shrimp and enriched brine shrimp

Chopped marine shrimp

Clam or mussel meat

Appropriately sized pieces of squid

Quality frozen marine carnivore preparations

Suitable marine pellets when accepted

Watch each feeding to confirm that food is swallowed and that quieter tankmates receive a share. Distribute small portions across open water rather than making every fish compete at one feeding point.

Use suitable feeding tools and keep fingers away from the mouth. Investigate a persistent change in appetite or difficulty handling food rather than repeatedly increasing the ration.

Mysis Shrimp Fortified Brine Shrimp Krill Squid Chopped Fish Clam Flesh Hard-Shelled Marine Foods Carnivore Pellets
The female Blue Throat Triggerfish is generally less aggressive than many other triggerfish, but it remains a large, confident species capable of defending its territory. It may become more assertive as it matures, particularly around food or a preferred cave.

Suitable tankmates include tangs, rabbitfish, larger angelfish, butterflyfish, robust wrasses, groupers too large to be swallowed, and other medium-to-large marine fish with compatible temperaments. Avoid very timid species that may be intimidated or prevented from feeding.

Keep one specimen in most aquariums. A female may be housed with a male in a very large system, but introductions should be supervised carefully. Use caution with other triggerfish, especially similarly shaped species competing for the same territory.

Compatibility must be reassessed after the fish settles in and as it matures. Repeated chasing, damaged fins, missed meals, or a fish confined to one corner are signs that the arrangement is not working.

Have a practical separation plan before introductions. Visual barriers and distributed feeding can reduce some competition, but they cannot make a persistently aggressive combination safe.

The Blue Throat Triggerfish is reef safe with caution . Its natural diet is centered on zooplankton rather than coral tissue, and healthy stony corals, soft corals, zoanthids, and anemones are generally ignored. This feeding ecology makes Xanthichthys triggerfish more suitable for reef displays than most members of the triggerfish family.

Small ornamental shrimp, crabs, snails, exposed worms, and other bite-sized invertebrates may still be investigated or consumed. Larger established cleaner shrimp sometimes coexist successfully, but they should not be considered guaranteed safe. Very small fish may also be at risk from a mature specimen.

Secure loose coral fragments and lightweight decorations, as a large triggerfish may accidentally shift them while swimming, feeding, or entering a retreat.

Regular feeding does not guarantee that potential prey will be ignored. Select the display around the animals you need to protect rather than assuming that an established cleanup crew is safe.

Secure loose coral fragments or decorations and preserve clear routes around the aquascape. A short period without damage is not proof of permanent compatibility.

FAQ

Frequently Asked Questions

About the Blue Throat Triggerfish - Female

  • What tank size does the Blue Throat Triggerfish - Female need?
    Provide at least 180 gallons for adult housing. Up to 11.8 inches (30 cm).
  • Is the Blue Throat Triggerfish - Female reef safe?
    The Blue Throat Triggerfish is reef safe with caution . Its natural diet is centered on zooplankton rather than coral tissue, and healthy stony corals, soft corals, zoanthids, and anemones are generally ignored. This feeding ecology makes Xanthichthys triggerfish more suitable for reef displays than most members of the triggerfish family. Small ornamental shrimp, crabs, snails, exposed worms, and other bite-sized invertebrates may still be investigated or consumed. Larger established cleaner shrimp sometimes coexist successfully, but they should not be considered guaranteed safe. Very small fish may also be at risk from a mature specimen. Secure loose coral fragments and lightweight decorations, as a large triggerfish may accidentally shift them while swimming, feeding, or entering a retreat. Regular feeding does not guarantee that potential prey will be ignored. Select the display around the animals you need to protect rather than assuming that an established cleanup crew is safe. Secure loose coral fragments or decorations and preserve clear routes around the aquascape. A short period without damage is not proof of permanent compatibility.
  • What does the Blue Throat Triggerfish - Female eat?
    The Blue Throat Triggerfish is primarily a zooplanktivore in nature, forming loose aggregations above current-swept reef slopes while feeding heavily on drifting copepods and other planktonic prey. Offer a varied carnivorous diet that includes mysis shrimp, enriched brine shrimp, krill, chopped clam, mussel, squid, shrimp, scallop, and quality frozen marine blends. Slow-sinking carnivore pellets can also be included once the fish is accustomed to prepared foods. Feed two or three moderate portions daily. Allow some food to drift through the water column to support its natural feeding behavior. Occasional hard-shelled marine foods may help provide feeding enrichment and natural tooth wear, but freshwater feeder fish should not be used. Use a rotation of accepted foods rather than one item as the entire diet. Practical options include: Mysis shrimp and enriched brine shrimp Chopped marine shrimp Clam or mussel meat Appropriately sized pieces of squid Quality frozen marine carnivore preparations Suitable marine pellets when accepted Watch each feeding to confirm that food is swallowed and that quieter tankmates receive a share. Distribute small portions across open water rather than making every fish compete at one feeding point. Use suitable feeding tools and keep fingers away from the mouth. Investigate a persistent change in appetite or difficulty handling food rather than repeatedly increasing the ration.