Some can grow to a very large size of up to 14 or 16 inches, with a few growing to about two feet. This Family is found in tropical seas including the Mediterranean Sea and the Atlantic, Pacific, and Indian Oceans. The Trigger Family includes about 30 species, with at least nine of these to be known from the Hawaiian area. If at some point you see your Triggerfish laying on the bottom of the tank or propped up against the side, don't worry, it is how they sleep sometimes. Some Triggerfish are capable of making a noise, much like a pig grunting, when disturbed or agitated.
Triggers are extremely territorial and seem to be on the move most of the time.
In general they do get along with most other fish. They need plenty of room to move around, as well as establish their territory with as little infringement from other tank mates as possible. With a tendency to be aggressive towards other Triggerfish, especially those of the same species, usually putting them together is not a good idea. Their nature can be unpredictable. Sometimes they can harass and pick on other fishes, and other times they may get long just fine.