i got my jar when he was around 3-4 inches now hes at 6inches, before he kept a tank to himself but i decided to try him in with other fishes and he shows no aggression. oh yeah before when he was isolated he ate feeders once a week but now i dont give him feeders anymore. anyways when hes eating pellets again no aggression but when i drop some blood worms in he'll snatch it from the other fishes. but the fishes are brave enough to swim beside the jar and eat outta his mouth, currently with id sharks, a red pariot, couple cichild and gourmais