Honestly I had two, not together at the same time but both same size. They never had a problem with any other fish, never harmed/scared any of the small fish. Even when the other fish stole their food because they’re a little slower than my other fish they were pretty peaceful. I didn’t believe the whole trigger behaviors until my recent trigger gobbled my cleaner wrasse as a snack. I never had any issues with my clown triggers, can’t be a coincidence twice. I’d start with a small to medium size just to be sure. Even my current trigger is pretty peaceful, just happens to eat smaller fish or at least it happened once.Are they as mean as everyone says?