Balistapus undulatus
Reef Compatible: No
Care Level: Intermediate
Disposition: Aggressive
Min. Tank Size: 50 gallons
Mature Size: 12 inches
Specifications
| Feature | Detail |
|---|---|
| Size (Adult) | 12 inches |
| Size (L) | 3″ to 4″ |
| Compatibility | Not reef compatible |
| Difficulty Level | Intermediate |
| Behavior | Aggressive |
FAQ
Is this fish suitable for a reef tank?
No, this fish is not reef compatible and may harm coral or other invertebrates.
What is the minimum tank size required?
A minimum tank size of 50 gallons is recommended.
How aggressive is this fish?
This fish is known to be aggressive and may attack other fish, especially smaller or slower-moving species.

Joe Sanderson –
I bought this triggerfish for my 60-gallon tank. It’s quite active and aggressive, so I had to keep it in a well-structured setup with plenty of hiding spots. It doesn’t eat coral, which is good, but it does chase smaller fish. Still, it’s a striking addition to the tank and adds visual interest.
Carolyn Robertson –
The fish arrived healthy and seems to be adjusting well. I’ve noticed it’s quite territorial and doesn’t tolerate other fish in close proximity. I’m keeping it with larger, more robust species. It’s not for beginners, but it’s a bold and interesting choice.
Jake Ince –
After a few weeks, the triggerfish has become a dominant presence in the tank. I’ve had to rearrange some decorations to give it space. It’s not reef-safe, but it’s a great centerpiece for a larger, open tank with strong water flow.