? Arowana likes to bully fish that are smaller than them. If you mix fish that are bigger than them, they generally don't fight. They may fight with other fish for food, mates, territory and other reasons. Sometimes the fish will form a group to attack the target, whether the target responds to their provocation or not, they will continue to chase and bite the target fish until they are killed. When they are raised, if they are found fighting, they should be isolated.
? Manlongyu has a ferocious temperament. They will not only attack the smaller and weaker fish in the same species, but also bully the thinner fish in other species. If they are mixed with small tropical fish such as red and green lantern fish, lotus lantern fish and green lotus lantern fish, they are likely to attack these small fish. If they are hungry, they will eat small fish fry.
In the case of sufficient food and space, when they are mixed with fish of similar size, they will converge a lot and generally will not take the initiative to attack. Therefore, in polyculture, it is necessary to use a larger tank to provide them with sufficient space to move, in order to reduce fighting.
