Yes, in a 125. Very aggressive. I keep it with a lion, dogface puffer, bursa trigger, and some blue devil damsels. Undisputed boss of the tank. Get a good fat specimen, feed it nori/broccoli/algae etc. Mine likes to eat a lot of meaty foods as well. Feed it often, give it good quality water, and don't house it with any other tangs in anything less than a few hundred gallons. I'd say 125 is probably the minimum for this fish.