Blue Throat Triggerfish - Female - Xanthichthys auromarginatus

ML (3.75-4.5")

$184.99

Blue Throat Triggerfish - Female - Xanthichthys auromarginatus

$184.99

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Goes well with:

Diet

Mysis Shrimp Finely Chopped Seafood Shellfish

Min Tank Size 180 gallons

Temperament Semi-Aggressive

Reef Safe With Caution

Care & Diet Feeding, nutrition, and best practices.

Diet Type: Carnivore

Blue Jaw Triggerfish are omnivorous, requiring a varied diet to maintain optimal health. Their diet should include a mix of meaty foods such as shrimp, squid, and krill, along with high-quality marine pellets and flakes. It's beneficial to supplement their diet with algae or spirulina to mimic their natural feeding habits. Feeding should occur 2-3 times daily in small amounts to prevent overfeeding and maintain water quality. Regularly varying their diet ensures they receive all necessary nutrients.

Mysis Shrimp Finely Chopped Seafood Shellfish

Behavior Temperament, activity level, and interactions.

Temperament: Semi-Aggressive

Blue Jaw Triggerfish are active swimmers, often exploring mid to bottom levels of the water column. They are social but can be territorial, especially during breeding. Males exhibit vibrant colors to assert dominance and attract mates. Generally peaceful, they coexist well with similarly sized, non-aggressive species but may display aggression towards smaller, shy fish. They thrive in environments with ample space and hiding spots, which help mitigate territorial disputes and reduce stress.

Tank & Aquascape Tank requirements and aquascaping tips.

Min Tank Size: 180 gallons
Max Size: 12 inches
Care Level: Moderate
Origin: Indo-Pacific

Compatibility Tank mates, aggression, and introduction order.

Temperament: Semi-Aggressive
Reef Safe: With Caution

Triggerfish Reef Safe With Caution Carnivore

Reef & Health Reef safety, common issues, and prevention.

Reef Safe: With Caution
Care Level: Moderate

FAQs Answers to the most common questions.

How can I reliably distinguish a male Blue Jaw Triggerfish from a female, and does sex matter for aquarium behavior and coloration over time?

Males have a bright blue “jaw” (lower face), yellow edging on the dorsal and anal fins, and often a more intense blue-gray body with faint vertical bars; females are usually duller gray with a less vivid or absent blue chin and minimal yellow fin trim. In captivity, some females can develop partial male coloration if no dominant male is present, but full sex transition in this species is debated and not consistently observed. Sex matters behaviorally: males tend to be slightly more territorial and bolder, especially as they mature, while females are often more reserved. If your goal is a calm semi-reef community and subtle color is acceptable, a single female can be an excellent choice; if you want the brightest colors, a single male or one male with one female (in a large tank) is ideal.

What minimum tank size and aquascape layout specifically suit an adult Blue Jaw Triggerfish, and how should rockwork be arranged to reduce stress and aggression?

A single adult Blue Jaw Triggerfish does best in at least a 125-gallon (475 L) tank; 180 gallons (680 L) or more is recommended for especially active individuals or for keeping with other sizable fish. They like open horizontal swimming space plus multiple cave-like retreats. Build rockwork as solid, stable “buttresses” rather than narrow towers, since triggers often wedge themselves into crevices at night and can topple loose rocks. Create at least two or three cave systems with different entrances so the fish can retreat without getting cornered by tankmates. Leave a clear “racetrack” of open water around the rock islands to allow continuous swimming and to reduce territorial bottlenecks. Avoid sharp overhangs pointing upward where the trigger might scrape its forehead while darting into hiding.

How can I keep a Blue Jaw Triggerfish well-fed without overloading the tank with nutrients, and what are ideal food types and feeding patterns for long-term health?

Blue Jaws are hearty eaters and need a varied, meaty diet but are less destructive than many triggers. Ideal staples include: high-quality marine pellets (medium to large size), frozen mysis shrimp, chopped squid, clam, shrimp, krill, and occasional whole shell-on foods (like small clams or mussels) to work their teeth and jaw muscles. Feed small portions 2–3 times per day rather than one large meal. Aim for what it can fully consume in 30–60 seconds, watch for spit-out fragments, and siphon uneaten chunks after feeding if possible. To manage nutrients, use strong mechanical filtration (filter socks, roller mat), a good skimmer, and consider feeding with pumps temporarily off so food doesn’t disperse into rockwork. You can also alternate heavier meaty meals with lighter pellet feedings, and schedule the heaviest feeding just before or during your skimmer’s most active period.

Are Blue Jaw Triggerfish truly “reef safe,” and which specific invertebrates or corals are most at risk versus generally safe in a mixed reef tank?

Blue Jaw Triggerfish are among the more coral-safe triggers, but “reef safe” is not guaranteed. They typically ignore corals themselves, so SPS, LPS, and soft corals are usually fine. The main risk is mobile invertebrates. They often prey on or at least pick at: small snails, small hermit crabs, ornamental shrimp (especially cleaner shrimp and sexy shrimp), and tiny crabs. Larger, well-armored inverts (large turbo snails, big hermits) have better odds but are not completely safe. Clams may be at risk if the fish learns to nip the mantle, though some keepers report success with large Tridacna in big tanks. If you want to maximize safety, avoid delicate ornamental shrimp and very small crabs, expect to replenish clean-up crew periodically, and introduce the Blue Jaw after corals are established so it is less likely to experiment with nipping tissue out of boredom.

My new Blue Jaw Triggerfish is hiding constantly and refuses food for several days after introduction. What species-specific acclimation steps can I take to help it settle and start eating?

Blue Jaws are more timid than many triggers and often react to new surroundings by hiding and fasting. To help: 1) Dim lights for the first few days, or reduce the photoperiod; bright lights can intimidate them. 2) Provide ample caves and overhangs, ideally including one that faces a quieter side of the tank. 3) Use a social acclimation box (for 3–7 days) if there are assertive tankmates; this lets the trigger see others without being chased. 4) Start with very enticing foods like thawed mysis, enriched brine shrimp, or small bits of fresh clam or shrimp on a feeding stick right near its chosen cave. 5) Keep human movement slow and avoid tapping the glass or sudden approach. 6) Check that temperature, salinity, and pH closely match the water it came from to minimize physiological stress. Many Blue Jaws will not eat for 3–7 days after introduction; as long as breathing is steady, fins are not clamped tightly, and there are no visible parasites, this is usually normal. Once it takes the first few bites, gradually transition to your regular varied diet and normal lighting over a week.

You will receive a fish SIMILAR in design and size to the fish in the photo. This is NOT a WYSIWYG fish.

Blue Throat Triggerfish – Female – Xanthichthys auromarginatus

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.

Quick Care Guide

Care Level: Moderate
Minimum Tank Size: 180 gallons
Temperament: Semi-aggressive
Diet: Carnivore / Planktivore
Reef Safe: With Caution
Region: Indo-Pacific
Scientific Name: Xanthichthys auromarginatus

Tank Requirements

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.

Diet and Feeding

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.

Temperament and Tankmates

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.

Reef Compatibility

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.

Water Parameters

Temperature: 75–80°F
Specific Gravity: 1.024–1.026
pH: 8.1–8.4
Alkalinity: 8–12 dKH

Maintain strong oxygenation, consistent salinity, and low levels of accumulated organic waste. Stable conditions are more important than repeatedly adjusting the aquarium to reach one exact value.

Common Considerations

Plan for a large adult: This active triggerfish can reach approximately 12 inches and requires extensive horizontal swimming space.
Female coloration is more subdued: Females lack the male’s vivid blue throat and strong yellow fin margins.
Reef safe with caution: Corals are generally ignored, but small shrimp, crabs, snails, and other invertebrates may be eaten.
Provide frequent meaty meals: Its natural plankton-feeding behavior is best supported with two or three varied feedings daily.
Use care during capture: Powerful teeth and locking dorsal spines make a rigid specimen container safer than a fine-mesh net.