Just got a baby yellow tang yesterday he's about 2". I noticed last night that he was bullying my firefish and now today he's bullying my two clowns and the firefish, also picking on some snails. The only fish he's not messing with are the 3 green chromis, I think it might be because the came from the same tank at the LFS. Is this something normal or should I take him back and get a different one, I don't want all my fih stressed out. He also eats flakes like crazy!!