About 3 months. The flat fish can be frozen for about 3 months. If you want to freeze the flat fish, you can wash the flat fish, dry it, wrap it in plastic wrap, and then store it in the freezer layer of the refrigerator. This can reduce the water loss of flat fish, have less contact with the outside world in a frozen environment, and reduce the growth of bacteria, so it can be stored for a longer time. It is not recommended to eat it if it is frozen for more than three months. The growth of bacteria is reduced during the freezing process, but bacteria will also grow if the time is too long, so it is not recommended to use it after more than three months.