Although fish is a kind of omnivorous fish which is fully trained by human, it still has influence on the choice of food properly or not. And the right or wrong food can affect the fish growth and development, color color, bright shades, plump or not, as well as fertility and other issues. Fish are usually fed with fish worms (daphnia), cyclops (cyprinids), tussock worms (migratory), tsetse (mosquito larvae), earthworms, etc. Artificial food can also be eaten. Artificial feeds can also be eaten but are not the best choice. Fish can also eat plants, such as turnip, watercress and other tender leafy plants. Attention: 1. Pay attention to the water quality and dissolved oxygen in the fish pond If you find that the water quality is bad, you should add water in time to improve the water quality of the fish pond. The amount of dissolved oxygen per liter of water in the fish pond is generally required to be more than 4 milligrams, and if it is lower than 4 milligrams, oxygen should be added to the fish pond.　　2. Pay attention to the regulation of feeding volume should be based on changes in water temperature to increase or decrease the feeding volume, because the water temperature and fish feeding related to the water temperature, high water temperature, fish feeding more, and vice versa, less feeding. If the water temperature is above 10℃, the feeding amount can be 3%~4% of the total weight of the fish.　　3. Pay attention to the selection of different diameters of pellet feed Different sizes of fish should be fed different diameters of pellet feed. Generally for the length of 4-6 cm fish, it is appropriate to feed 0.5 mm diameter pellet feed; 7-8 cm long fish, it is appropriate to feed 3 mm diameter pellet feed.　　4. Pay attention to vitamin supplementation Because the vitamins are destroyed in the process of making pellet feed. Therefore, when raising fish with pellets, a small amount of vitamin-rich green feed should be fed to supplement the vitamin deficiency.