Carassius auratus can stimulate appetite, strengthen spleen, induce diuresis, reduce swelling, nourish and promote lactation, and clear away heat and toxic materials, and has direct or auxiliary effects on treating spleen and stomach weakness, anorexia, nephritis edema, ascites due to liver disease, postpartum hypogalactia, dysentery, bloody stool and other diseases. There are many cooking methods for crucian carp, especially braised crucian carp and crucian bean curd soup. Children often eat crucian carp to supplement calcium. Medical books say that eating meat for five days is not as good as eating fish for one day. Crucian carp is nutritious and beneficial to people as usual. It contains protein, fat, sugar, inorganic salts, vitamins A and B, etc.