The scales of hairtail stick firmly to the fish body, which is difficult to clean by rubbing with hands, and it takes time to scrape with a knife. If hairtail is put into water at about 80 degrees, scalded for 10 seconds, immediately immersed in cold water, and then scrubbed with a brush or cloth, the scales will be removed quickly. However, I suggest that you add some salt and ginger when cleaning, so that the freshness of fish will not be affected by foreign objects when cleaning. Hairtail has a strong fishy smell and greasy taste, so it is difficult to wash it with clear water. You can soak hairtail in alkaline water first, and then wash it with clear water, so it will be easy to wash, and there is no fishy smell.
Prepare two basins, a basin of hot water (about 80 degrees) and a basin of cold water. First put hairtail in hot water, soak it for 45 seconds, then take it out quickly and put it in cold water. Be sure to do it quickly. You will find that a large part of the fish scales have fallen off by themselves. Then gently rub it with your hands, and the remaining scales will be washed clean.