Parasites are found in the body of marine fish, which may cause parasitic diseases if eaten raw. Parasites are also found in marine fish, such as nematodes, which can be found in the internal organs and subcutaneous parts of marine fish (e.g. common yellowtail, scallop, etc.). When eaten raw, it is possible to contract parasitic diseases. If you eat raw sea fish containing parasites and suffer from parasitosis, you may experience digestive symptoms such as abdominal pain and nausea, and in severe cases, diseases such as gastric perforation may occur. If you feel sick after eating raw, you should go to your local hospital immediately. When eating marine fish, it is best to buy marine fish from regular channels, and before eating, it should be fully processed, heated until cooked, and not eaten raw to avoid illness.