First blanch with boiling water to remove the mucus on the surface of diced yellow pepper. Pay attention to the water temperature of about 90 degrees. It's usually hot to be alive.
Second, wash the surface of the fish with salt to remove mucus. But be careful not to get stabbed.
Third, sprinkle flour on the fish and wash it.
Of these three methods, the first one is often used because it has the best effect and is very clean. Emotional washing of fish belly is relatively simple, all internal organs are removed, and it can be washed many times with running water.