It is a normal phenomenon for scavengers to occasionally suck other fish. When they suck fish, breeders can carefully observe them. If they occasionally suck different fish, breeders do not need deliberate interference. Because this situation will not cause great problems to other fish. If they are chasing a fish and sucking all the time, they need to stop it. Because the scavenger has been sucking the same fish, it may be that the fish is sick. It is best for breeders to fish out the sucked fish and raise them separately. This can avoid scavengers sucking them all the time, which will affect their rest and recovery.

Scavengers suck fish because they will tend to eat meat when they grow up, and their appetite will become larger. At this time, the moss and algae in the fish tank can no longer satisfy them, so they will keep sucking other fish and chase sick fish all the time. Because scavengers are nocturnal fish, and their activities are very frequent at night, they will cause other fish to fail to rest normally, and their illness will become more and more serious until they die. After fish die or stop moving, scavengers will eat all their bodies overnight.