I've got one, one of the absolute most beautiful fish IMO. Not fancy colors like some of the fish, but something about them just drew me in. Mine has shown no aggression to any other fish in the tank, leaves my peppermint and cleaner shrimp alone, and eats from the air line on the end of a syringe that I use to feed them. I have seen numerous people report problems with keeping multiple bangaii's in the same tank (at least smaller tanks less than 75g), but I only have one and can't comment on that. I will say mine was in a tank with 8 or 9 others in the store and didn't seem to have a problem with them.