No need. The yellow film on fish is fish skin, which can't be washed off. Steamed or boiled soup will automatically fall off after cooking. Goya fish, scientific name Pelteobagrus fulvidraco, is a common freshwater fish. Generally, they live in places with slow water flow and many aquatic plants, and their eating habits are quite miscellaneous. In the wild state, it mainly feeds on animal bait, zooplankton can be eaten in the fry stage, and insects, fish and shrimp can be eaten in the adult fish. This kind of fish is also widely distributed in China, and is found in the Pearl River, Minjiang River, Xiangjiang River, Yangtze River and other waters.