2. Red trout, nicknamed goldfish, _, red-eyed trout, red-eyed stick, red-eyed fish, drunken fish and wild grass fish, belongs to the family Salmonidae, and is a precious fishing and food fish, with only about 10 species in the world. Red-eyed trout is a kind of pelagic fish, which likes to live in slow-flowing waters and lakes. When the river rises, it enters the river and clusters during the breeding period. Young fish often feed in shallow waters along rivers and lakes, and their feeding habits are miscellaneous, mainly algae and aquatic higher plants, and they also eat aquatic insects, small fish and fish eggs, as well as freshwater shellfish.