Broadly speaking, fish that can live in fresh water with salinity of three thousandths can be called freshwater fish. In a narrow sense, it refers to fish that have only "juvenile stage" or "adult stage" in some stages of their life history, or must spend their whole lives in fresh water areas. Common edible freshwater fish are grass carp, carp, crucian carp, catfish, silver carp and snakehead.
Grass carp; Buji fish
Grass carp is CYPRINIDAE, CYPRINIDAE, CYPRINIDAE? ? ? ? A genus of the family. The common names of grass carp are: pomfret, pomfret, pomfret, grass pomfret, pomfret, grass carp, grass root (northeast), coarse fingered fish (southern Shandong), sea pomfret (south), hybrid, black herring and so on. Rivers and lakes inhabiting plain areas generally prefer to live in the middle and lower layers of water and coastal areas with more aquatic plants. Sexually active, swimming fast, often foraging in groups. It is a typical herbivorous fish. Grass carp eat larvae, algae, etc. In the juvenile stage, grass carp also eat some carnivorous foods, such as earthworms and dragonflies. Overwintering in the deep water of mainstream or lake. Parent fish have the habit of swimming against the current during the breeding season. It has been transplanted to many countries in Asia, Europe, America and Africa. Because of its rapid growth and wide sources of feed, it is one of the four largest freshwater fish in China.
European crucian carp
Crucian carp, common in Eurasia, is a common freshwater fish, belonging to one of the fishes of Carassius. After artificial breeding, crucian carp can produce many new varieties, such as goldfish, which is an ornamental fish. Crucian carp is mainly an omnivorous fish that feeds on plants. It likes to live in groups and choose food. The meat is tender and has high nutritional value. Every100g of meat contains protein13g, fat 1 1 g, and contains a lot of minerals such as calcium, phosphorus and iron. Carassius auratus has high medicinal value, and is flat and sweet. Entering the stomach and kidney has the effects of harmonizing middle energizer, tonifying deficiency, removing phlegm, warming stomach and nourishing middle energizer.
Silver carp
Silver carp, also known as silver carp, silver carp and silver carp, belongs to CYPRINIDAE and is one of the four famous fish. The figure is flat on the side, slightly tall, spindle-shaped, with blue-gray back and white sides and abdomen. The head is bigger. Eye position is very low. The balance is fine. The central horny edge of the abdomen extends from below the pectoral fin to the anus. The pectoral fin does not exceed the base of the ventral fin. Fins are gray. The shape is similar to that of bighead carp, and silver carp is impatient and good at jumping. Silver carp is a large freshwater fish raised artificially, which grows fast, has few diseases and high yield, and is mostly mixed with grass carp and carp. Its meat is tender and nutritious, and it is one of the excellent fish species suitable for breeding. It is one of the main freshwater cultured fish in China. Distributed in major water systems throughout the country.