Hes a very nice fish, no question. He's not even THAT much of a jerk. He chases other fish around but rarely does any actual contact. I have to sell him to make room for my puffer(s). I have 2 Mbu Puffers that I will be trying to have together in the same tank once the smaller one gets a bit bigger. I adopted a 14" one on short notice. The tank is currently divided with the puffer in 1/3 of it, and the loaches/cichlids in the other half. The cichlids are for sale because I think they would likely kill the puffers.