Scavenger itself will not fight with fish, he has no offensive weapons, only sucker-like mouth, there is no aggressiveness, you can rest assured and a variety of fish mixed together.

But sometimes he will adsorb some of the bottom life of the fish, such as rainbow fish, beckoning cat, etc., and if it is always adsorbed a fish then there is a possibility that that is a sick fish, you have to observe more of that fish whether there is any abnormality, the scavenger can also help you to find sick fish in time.