Scavengers can choose to give them away if they don't want to raise them. They have lower requirements on the environment, strong adaptability and the function of cleaning fish tanks. Many fish farmers will raise several scavengers to clean fish tanks. Breeders can give scavengers to fish lovers, as well as relatives and friends. Breeders can also ask the local aquarium. Generally, aquariums recycle fish, and breeders can sell them to aquariums. It should be noted that scavengers are invasive alien species. If you don't want to raise them, you must not release them. Because they have no natural enemies in the wild, once they are released into the wild, it will greatly damage the local ecological environment.

Scavengers generally do not suck fish. Only when other fish are sick and the mucus on the surface of the fish increases will they suck fish. If the scavenger is found to suck fish, the breeder needs to carefully observe whether the sucked fish is sick. After confirming that it is sick, the breeder needs to fish out the sick fish immediately.

Another reason why scavengers suck fish is lack of nutrition. Many breeders do not feed scavengers specially, so they will suffer from malnutrition. After discovering this situation, breeders can feed scavengers more nutritious food, which can prevent them from sucking fish.