It depends on the individual. Overall African Aros are peaceful to fish that aren't Aros. I feed my smaller African Aro black/bloodworm. When my African Aro are 12"+, I feed mealworm/superworm,mp,tilapia,pellets,etc. They can grow over 36". 2"-4" African Aros can be fragile, a lot of people trying keeping them but end up dieing.