Blue Jaw Triggerfish Care: Tank Setup, Diet, Tank Mates, Diseases & More!

Blue Jaw Triggerfish are fascinating creatures, known for their unique appearance and remarkable personalities. These colorful marine animals have captured the hearts of many aquarists, becoming popular choices for saltwater aquariums.

Blue Jaw Triggerfish care involves providing a suitable aquarium environment, proper diet, and regular maintenance. These saltwater fish require a large tank with plenty of hiding places and open swimming space. They need a varied diet of meaty foods, including crustaceans and mollusks. Regular water changes and maintenance are also important for their health and well-being.

I remember encountering my first Blue Jaw Triggerfish during a diving expedition in the Maldives. Its striking colors and intriguing demeanor captivated me, and I’ve been a fan ever since.

Caring for a Blue Jaw Triggerfish requires attention to detail, commitment to providing the right environment, and understanding their specific needs. In this article, we’ll discuss essential aspects of Blue Jaw Triggerfish care to ensure their well-being and happiness in your aquarium.

Species Summary


The Blue Jaw Triggerfish, also known as Xanthichthys auromarginatus, originates from the tropical waters of the Indo-Pacific region.


Blue Jaw Triggerfish are known to have a lifespan of 8 to 10 years if given proper care and ideal environment.


Visually striking, the Blue Jaw Triggerfish has a beautiful combination of colors, including a light blue body with a yellow-bordered dorsal fin and distinct blue lines around the mouth. Each individual fish’s coloration can vary slightly.


Typically, these fish can reach sizes of up to 12 inches, although some may only grow to be 8-10 inches.

Growth Rate

Blue Jaw Triggerfish have a moderate growth rate, usually reaching their full size within 2 to 3 years.

Behavior & Temperament

These fish are known for being less aggressive than other triggerfish species. They are relatively peaceful and can be kept with various tank mates. However, I once had a Blue Jaw Triggerfish that was territorial in a smaller tank, so keep that in mind when considering tank size.

Male vs Female

Males and females display slight differences in coloration. Males have more of a vivid blue hue around their jawline, while females are creamier with yellow and green coloration.

Tank Setup

Tank Size

When setting up a tank for Blue Jaw Triggerfish, it’s crucial to provide ample space. I remember when I started, I learned that a minimum of 125 gallons is recommended for a single fish.


Triggerfish don’t have strict lighting requirements, but they do appreciate a day-night cycle. Moderate lighting is ideal for these fish, and a programmable LED light can help achieve this.

Filtration & Aeration

Efficient filtration is essential for maintaining water quality. A strong filter with biological, mechanical, and chemical components works best. Additionally, include an air pump and air stone to promote proper oxygen exchange.


A heater is necessary to maintain a stable temperature of 72-78°F (22-25°C). I prefer an adjustable heater with a thermostat as it allows me to manage the temperature more efficiently.

Temperature RangeHeater Type
72-78°F (22-25°C)Adjustable Heater


A fine sand substrate is ideal, as Blue Jaw Triggerfish sometimes like to bury themselves. Ensure the substrate is clean and provides a comfortable environment for the fish.


These fish appreciate caves and crevices where they can hide. Use rocks or artificial decorations to create a natural-looking environment. Remember to secure large rocks to avoid potential accidents.


Although not essential, live or artificial plants can create a more visually appealing tank. When I first experienced Blue Jaw Triggerfish care, I found that incorporating plants made my fish more active and stimulated.

Water Quality

Water Temperature

Blue Jaw Triggerfish thrive in water temperatures ranging from 72°F to 78°F (22°C to 26°C). I once experienced a significant drop in temperature in my Blue Jaw Triggerfish tank, and it resulted in less activity for the fish; they became sluggish and lost their appetite. To avoid this, I advise investing in a reliable heater and monitoring the water temperature consistently.

Water pH

These fish prefer slightly alkaline water conditions, with a pH level around 8.1 to 8.4. In order to maintain a stable pH, I’ve found it helpful to use buffering agents and regularly test the Aquarium’s water.

Water Hardness

Blue Jaw Triggerfish are adaptable to various water hardness levels. Generally, they do well in 8 to 12 dGH. Keeping an eye on these parameters helps ensure that your Triggerfish stays healthy.

Water Changes

Regular water changes are essential for Blue Jaw Triggerfish care. It’s advisable to change 20% of the water every 1-2 weeks for optimal water quality. During my time caring for these fish, I’ve realized that consistent and timely water changes make a tremendous difference in the overall health and well-being of my Blue Jaw Triggerfish.

Tank Maintenance

To maintain a Blue Jaw Triggerfish tank, it’s essential to keep the water parameters stable. Weekly water changes of around 10% to 15% are highly recommended. This reduces the buildup of harmful waste and keeps the water clean.

Proper filtration is crucial for their health. I personally use a high-quality canister filter with mechanical and biological media to remove debris and bacteria. Additionally, having an appropriate heater to maintain a consistent temperature of 72-78°F is essential for the fish to thrive.

Blue Jaw Triggerfish are territorial, so providing them with ample hiding spots and swimming space is vital. Arrange live rock in the tank to create caves, crevices, and overhangs. This will allow the fish to establish their territory and prevent aggression.

Good water circulation is required to maintain a healthy environment in the tank. I use a couple of powerheads in my tank to ensure proper water movement. This not only provides oxygen but also aids in distributing nutrients and mimics their natural habitat.

Here’s a simple table to summarize the tank maintenance requirements:

ParameterRecommended Value
Weekly Water Change10-15%
FiltrationCanister filter
HideoutsLive rock
Water CirculationPowerheads

I remember when my Blue Jaw Triggerfish would rearrange the live rock in his tank, creating new territories and pathways. It was fascinating to see how intelligent and creative they can be.

Tank Mates

Compatible Fish Species

When I was selecting tank mates for my Blue Jaw Triggerfish, I found that they can coexist peacefully with several species such as:

  • Angelfish
  • Tangs
  • Lionfish
  • Wrasses

These fish tend to share a similar temperament and can withstand the occasional nip from the triggerfish.

Incompatible Fish Species

On the other hand, Blue Jaw Triggerfish should not be housed with certain species that may cause aggression or stress, such as:

  • Damsels
  • Blennies
  • Gobies

Remember to closely monitor interactions between new tank mates, as individual temperament can vary.


What To Feed

The Blue Jaw Triggerfish is an omnivorous fish. In the wild, they primarily eat plankton, crustaceans, algae, and mollusks. In order to keep them healthy in an aquarium, I find it best to replicate their natural diet as closely as possible.

Offer a variety of high-quality pellet foods, brine shrimp, and krill, as well as vegetable matter such as seaweed sheets. A diverse diet will ensure they receive all necessary nutrients.


Feeding should occur 2-3 times per day with small portions. This will help to ensure they always have something to snack on, while not overfeeding them or polluting the water.


One tip I can offer from personal experience is to soak pellet food in aquarium water for a couple of minutes before feeding them, this makes it easier for the fish to digest.

Another helpful practice is the variety of their diet; every once in a while, try to introduce new food items to keep them interested and engaged.

Also, adding live foods occasionally can be beneficial and provide them with the challenge of hunting.

Remember to remove any uneaten food after each feeding. Over time, you’ll get a better understanding of how much food your Blue Jaw Triggerfish consumes, allowing you to adjust portion sizes accordingly.

Common Diseases


Blue Jaw Triggerfish are generally hardy, but they can be susceptible to a few diseases:

  • Ich (White Spot Disease): Caused by the protozoan parasite, Ichthyophthirius multifiliis.
  • Marine Velvet (Amyloodinium ocellatum): A parasitic dinoflagellate that affects the skin and gills of fish.
  • Bacterial Infections: Triggerfish can also develop infections due to bacteria, often caused by poor water quality and stress.


It’s essential to observe your Blue Jaw Triggerfish regularly for these symptoms:

  1. Ich: Fish will develop small white spots on the body, gills, and fins. They may scratch against objects and appear lethargic.
  2. Marine Velvet: Infected fish may exhibit gold or yellowish dusting on the body, rapid breathing, and clamped fins.
  3. Bacterial Infections: Symptoms include ulcers, fin rot, and inflammation around the mouth and eyes.


If you notice any symptoms, take immediate action to treat your fish:

  1. Ich: Raise the water temperature to around 86°F (30°C) and add aquarium salt. Treat with a copper-based medication.
  2. Marine Velvet: Treat with a copper-based medication, and monitor the fish closely. Supportive care is essential.
  3. Bacterial Infections: Quarantine affected fish and treat with a broad-spectrum antibiotic.


To help prevent diseases in your Blue Jaw Triggerfish:

  • Maintain water quality by regularly testing and changing water.
  • Quarantine new fish before adding them to the main tank.
  • Feed a balanced diet and offer a variety of foods.

I once dealt with an Ich outbreak in my tank, and by acting quickly, I was able to save my Blue Jaw Triggerfish. A watchful eye and proper care are crucial to keep your fish healthy and happy!

Signs of a Healthy Fish

When it comes to Blue Jaw Triggerfish, there are a few key signs that indicate a healthy fish.

  1. Vibrant Colors: A healthy Blue Jaw Triggerfish will have bright, vibrant colors. This is a great indicator of a fish’s overall health.
  2. Active Behavior: These fish should be active and constantly exploring their surroundings. If they’re swimming around and interacting with the environment, it’s a good sign.
  3. Once, I noticed that a Blue Jaw Triggerfish in my tank started to become less vibrant and less active. After some research, I found out that it was due to an issue with water quality in the tank. I quickly resolved the issue, and the fish returned to its vibrant, active self in no time.
  4. Healthy Appetite: Make sure your triggerfish has a healthy appetite. They should be eating regularly, and not showing any signs of lethargy or disinterest in food.
  5. Clear Eyes and Fins: When looking at your fish, check for clear eyes and intact fins. These are signs that your fish is not suffering from any infections or diseases.

By keeping an eye out for these key indicators, you can ensure that your Blue Jaw Triggerfish remains healthy and happy in your care.

Signs Your Fish is Sick

  1. Loss of appetite is often one of the first signs that your Blue Jaw Triggerfish might be unwell. Pay attention to their eating habits and take note of any sudden changes.
  2. Changes in behavior can also indicate illness. For example, a usually active fish suddenly becoming lethargic could signal a problem.
  3. Discoloration or spots on the fish’s body may indicate an infection. Inspect the fish closely for any unusual markings.
  4. Once, I noticed my Blue Jaw Triggerfish swimming erratically, and upon closer examination, it had a cloudy eye. This was a sign of a bacterial infection that required immediate attention.
  5. Issues with swimming are another sign of trouble. Watch for irregular movements, sinking, or floating near the surface.

Remember, early detection is the key to successful treatment, so be observant and act quickly if you notice any of these signs in your Blue Jaw Triggerfish.


Breeding Setup

When I first started breeding Blue Jaw Triggerfish, I noticed that an ideal breeding setup is crucial to their success. Make sure to separate the breeding pair in a dedicated breeding tank with the following parameters:

  • Temperature: 75-79 °F
  • Salinity: 1.020-1.026 SG
  • pH: 8.1-8.4

The tank should consist of:

  • Hiding places (e.g., PVC pipes)
  • Flat rocky surfaces (for egg laying)

How To Breed

To encourage Blue Jaw Triggerfish to breed:

  1. Offer a high-quality and varied diet, e.g., shrimp, squid, clams, and fish.
  2. Mimic a natural cycle of 12 hours of daylight and 12 hours of dark.
  3. Increase water quality by maintaining stable parameters and executing regular water changes.

Keep an eye out for the couple displaying courtship behavior like flashing colors, which hints that breeding might occur soon.


Eggs will hatch in about 5-7 days. As a breeder, proper care during this stage is essential:

  • Keep fry in a separate, well-oxygenated tank.
  • Provide live food sources (rotifers and copepods).
  • Maintain steady water parameters.

Remember, patience and attentiveness are crucial in achieving success when breeding Blue Jaw Triggerfish.

Product recommendations for Blue Jaw Triggerfish:

  1. Hikari Marine S Pellets: This fish food is specially formulated for marine fish, including Blue Jaw Triggerfish, and provides a balanced diet for optimal health.
  2. Seachem Stability: This product helps to establish a healthy biological filter in your aquarium, which is important for maintaining good water quality for Blue Jaw Triggerfish.
  3. Fluval Sea Protein Skimmer: This protein skimmer helps to remove organic waste from your aquarium water, which can be harmful to Blue Jaw Triggerfish.
  4. Hydor Koralia Nano Aquarium Circulation Pump: This circulation pump helps to create a natural water flow in your aquarium, which is important for the well-being of Blue Jaw Triggerfish.
  5. Instant Ocean Sea Salt: This sea salt mix is perfect for creating a healthy marine environment for Blue Jaw Triggerfish and other saltwater fish.
  6. API Aquarium Salt: This product helps to promote healthy gill function and reduce stress in fish, including Blue Jaw Triggerfish.
  7. Seachem Prime: This water conditioner helps to detoxify ammonia, nitrite, and nitrate in aquarium water, which can be harmful to Blue Jaw Triggerfish.
  8. Coralife BioCube 16 Gallon LED Aquarium Kit: This aquarium kit is perfect for keeping Blue Jaw Triggerfish in a medium-sized space, and comes with a powerful filtration system.
  9. Marina Floating Thermometer: This thermometer helps you to monitor the temperature of your aquarium water, which is important for keeping Blue Jaw Triggerfish healthy.


Caring for a Blue Jaw Triggerfish can be a rewarding experience. They are beautiful and unique marine creatures that make a great addition to larger saltwater aquariums.

When I first got my Blue Jaw Triggerfish, I was amazed at its striking colors and interactive personality. Quickly, it became the star of my tank.

Some key points to remember while caring for your Blue Jaw Triggerfish include:

  • A minimum tank size of 125 gallons
  • A varied diet with a mix of meats and vegetables
  • Adequate hiding spots and live rock formations
  • Water parameters should be stable and well-maintained

By giving your Blue Jaw Triggerfish the proper attention and care, you will witness its interesting behaviors and foster a healthy environment for your aquatic friend. Happy fishkeeping!


Q: What size tank is suitable for a Blue Jaw Triggerfish?

A: A tank size of 75-100 gallons is ideal for a single Blue Jaw Triggerfish.

Q: What are their ideal water parameters?

A: They thrive in water temperatures of 72-78°F, pH levels of 8.1-8.4, and salinity levels of 1.020-1.025.

Q: What should I feed my Blue Jaw Triggerfish?

A: They enjoy a varied diet, such as:

  • Shrimp
  • Clams
  • Mussels
  • Squid
  • Krill

Q: Can they be kept with other fish?

A: Generally, yes. Blue Jaw Triggerfish are less aggressive than most Triggerfish species.

Q: How can I ensure a healthy environment for my Blue Jaw Triggerfish?

A: It is important to maintain good water quality, and provide plenty of hiding spots using live rock.

Q: How long do Blue Jaw Triggerfish live?

A: In a well-maintained environment, they can live up to 8-10 years.

Personal Anecdote

I remember the first time I introduced a Blue Jaw Triggerfish to my aquarium. It was fascinating watching them interact daintily with their environment, exploring hiding spots, and peacefully coexisting with the other fish. This became a great addition to my aquarium!

Reference: Wikipedia.


Hi there! My name is Jacob, and I'm the founder of this Pet people blog that talks all about aquarium and fishkeeping. I've been passionate about fish and aquatic life since I was a kid, and I've spent countless hours learning about different species, their habitats, and how to create the perfect environment for them to thrive in.

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