scavenger fish can be eaten.

scavenger fish, also known as sucking fish and sucking catfish, is an edible fish with certain edible value. For example, in some fish markets in Guangdong, scavenger fish is sold as a new delicacy. Scavenger fish can be marinated in high-alcohol liquor, cooking wine or onion Jiang Shui to remove the fishy smell. After pickling, fry in a small amount of oil until cooked, sprinkle with fine salt particles, and serve with seasonings such as lemon juice, mint leaves, mustard or soy sauce.

scavenger fish, also known as trash fish and anglerfish, is an animal of the genus Silurus. Scavenger fish is native to rivers in South America. The fish body is semi-cylindrical, the tail fin is shallow fork-shaped, and it likes weak acidic soft water. The suitable water temperature is above 2℃, and the adult fish can't overwinter naturally. It moves at the bottom of the water body and likes to eat the residual bait and dirt of the aquarium, which can purify the water quality.