Freshwater fish refers to fish living in freshwater with a salinity of 3%, and is a relatively common fish, such as grass carp, silver carp, crucian carp, perch, etc. It has a certain food value, but has no anticancer effect. Edible freshwater fish is generally rich in protein, trace elements and other nutrients, which can provide essential nutrients for the growth and development of the organism, and is conducive to the maintenance of normal physiological functions of the organism, which can be consumed moderately in normal times, but is prohibited for those who are allergic to fish. Cancer may be related to family genetics, habits, environment and other factors, suffering from cancer should actively go to the hospital, under the guidance of physicians to carry out scientific and standardized treatment, food does not have anti-cancer effect, can not be blindly eaten.