Saltwater fish refer to fish that live in the ocean. They are particularly colorful and strange in shape. They are the future development direction of the ornamental fish industry. Artificial breeding requires certain methods and skills. There are about 2,000 kinds of seawater fish in my country, the common ones include large yellow croaker, giant grouper, salmon, etc. Fish meat is rich in animal protein and phosphorus. It is rich in nutrients, delicious and easy to be digested and absorbed by t