Do you have any other fish in the tank? Is he aggressive to them? said:
I have not attempted yet. He already charges the glass when my girlfriend comes up to the tank. He will bite your finger and retreat then come out again. He knows when you have food and when your just messing with him. At this point in time, I am pretty sure he would ninja kick any other fish in there. He will go into my 125 once he is larger. As for adding other fish, individual fish are different. That gold band at the store loved other fish ( was with naso and regal) but hated human hands.