i keep my jar with blue diamonds cichild kind of look like flowerhorns, along with many other fishes. i guess my jar is one of the friendlier ones oh yeah when i drop a blood worm square into the tank n the jar snatches it the cichilds will chase the jar n try to steal it and vice versa jar has kept to himself. i like to keep the jar full so it doesnt attack the other fishes when hes hungry