bukster, mine is very calm and does not pick on anyone. It is about the same size as yours. He does like feeder fish, and mine is definitly a nighttime feeder. It will not touch the feeders in the light, but as soon as the lights are out I can hear him thrash as he gobbles them up. He will eat sinking pellets during the day though. Oh, and he swims around under my 22" Pacu to stay out of the light.