Goldenback Triggerfish – Size L (6″ to 7″)
Scientific Name: Xanthichthys caeruleolineatus
Reef Compatible – With Caution
Care Level – Intermediate
Disposition – Aggressive
Min. Tank Size – 250 gallons
Mature Size – 30 inches
| Specification | Detail |
|---|---|
| Species | Xanthichthys caeruleolineatus |
| Size (Adult) | 30 inches |
| Size (Available) | 6″ to 7″ |
| Compatibility | Reef compatible with caution |
| Aggression Level | Aggressive |
| Minimum Tank Size | 250 gallons |
FAQ
Is this triggerfish suitable for a reef tank?
Yes, but with caution. The Goldenback Triggerfish can be compatible with a reef tank only if proper precautions are taken, such as ensuring strong tank structure and avoiding sensitive corals that may be damaged by its aggressive behavior.
What is the expected mature size of this fish?
The mature size of the Goldenback Triggerfish is up to 30 inches.
What is the recommended tank size for keeping this fish?
A minimum tank size of 250 gallons is required to provide adequate space and stability for this aggressive species.

Joan Wilson –
I bought this Goldenback Triggerfish for my 250-gallon reef tank. It has been in the tank for three months and is active but not overly aggressive. I’ve had to monitor its behavior closely, especially around smaller polyps. It’s a striking fish and adds visual interest, though it requires careful placement and regular observation.
Kylie McGrath –
The fish arrived healthy and was properly sized. After a week of acclimation, it settled into the tank and started exploring. I’ve noticed it occasionally bumps into corals, so I’ve repositioned some of the soft corals to avoid damage. Overall, it’s a bold and beautiful addition.
Vanessa McDonald –
I expected more aggression, but it’s not as active as I thought. Still, it’s important to keep a large tank and avoid placing it near delicate reef structures. It’s a good choice for experienced aquarists who can manage its behavior.