Soak the sea cucumber spots in cold water for 5 to 7 minutes, lift the tail of the fish, the body of the fish into a slanting surface, pour boiling water on both sides of the fish, and gently flick it with your hand to be able to remove some of the fish scales. Then put the scalded fish into cold water to rinse, can be used to scrape the fish's sand scales with a steel wire ball, about 3 minutes can be removed cleanly. (Be careful not to scrape the wire ball wire on the fish). If individual sand scales are not removed cleanly, use a knife to gently cut off can be.