Undulate Triggerfish
The Undulate Triggerfish, also known as the Orangelined Triggerfish or Orangetailed Triggerfish, has an attractive, emerald-green body with yellow-orange vertical stripes.
A 180 gallon or larger aquarium with large pieces of rock to form caves is ideal. It will rearrange the aquarium landscaping and rocks. It vocalizes using a “grunting” sound. It is a hardy fish, but aggressive towards other fish.
The Undulate Triggerfish needs a varied diet of meaty foods including; squid, krill, clams, small fish and hard shelled shrimp to help wear down their ever growing teeth.
| Approximate Purchase Size | Small: Under 2″ |
|---|---|
| Medium | 2″ to 4″ |
| Large | 4″ or Higher |
FAQ
What kind of tank size is recommended for the Undulate Triggerfish?
A 180 gallon or larger aquarium with large pieces of rock to form caves is ideal.
Is the Undulate Triggerfish aggressive?
Yes, it is aggressive towards other fish and may rearrange rock formations in the tank.
What should I feed my Undulate Triggerfish?
A varied diet of meaty foods such as squid, krill, clams, small fish, and hard-shelled shrimp is required to help wear down their continuously growing teeth.

Felicity Gibson –
The fish is very colorful and active. It does rearrange the rocks, so make sure your tank has plenty of structure. Feeding it squid and clams keeps it healthy. Needs space and a calm tank environment.
Christian Hill –
Beautiful green and orange pattern. It’s loud when it grunts, which is noticeable but not disturbing. I had to remove a small fish that was too timid. Otherwise, it’s a great addition to a large tank.
Molly Payne –
Looks stunning in the tank. The teeth wear down well with krill and shrimp. It’s not for small tanks or mixed communities. Requires a lot of space and careful planning.