There are many kinds of fish. Some fish are for human consumption. The meat is delicious and memorable. Some fish are highly ornamental. Many people will raise several fish for ornamental purposes. Raising fish not only needs to pay attention to the living environment of fish, but also the cleanliness of water. It also needs to pay attention to the food of fish. Don’t think that fish only drink water. There are also many kinds of fish. Generally, fish are divided into omnivorous, carnivorous and vegetarian. These three kinds of fish also have great differences in what they like to eat. Some fish are omnivores. They like to eat fish and insects, such as water fleas, mosquito larvae, water earthworms and some artificial feed. However, artificial feed is not a good choice. It is best to soak the feed for a while before choosing to put artificial feed, so as to facilitate the consumption of omnivorous fish. Omnivorous fish can also eat plants. They like to eat aquatic plants and some duckweed plants. Like the common crucian carp and carp in life, they are omnivorous fish. Some fish are carnivorous. Carnivorous fish can be eaten as long as they are meat and fishy, but some fish are picky and don’t like ready-made dead meat, but live meat. Generally, carnivorous fish are ferocious and aggressive. Just as mandarin fish and pike are ferocious fish, they will choose some small and medium-sized fish for food and take the initiative to prey. Some fish like to eat vegetarians and belong to vegetarian fish. For example, bream and grass carp belong to vegetarians among fish. They prefer to eat algae in water, stems, leaves and rot of some advanced plants. This kind of fish has long intestines, which is helpful to digest fiber. However, this kind of fish will also eat earthworms in cold seasons such as autumn and winter when there are no plants. What fish like to eat is mostly congenital, and some habits are also the consequence of the influence of the day after tomorrow. What kind of environment in life has a great impact on what fish like to eat, and even can change some food that fish like to eat the day after tomorrow.