The four major fishes in China, namely the four major fishes, refer to the artificially raised herring, grass carp, silver carp and bighead carp. It is a high-yield fish species selected by China/KLOC-0 in pond culture for more than 0/000 years.

Pomfret lives in the middle and upper layers of water and mainly eats zooplankton;

Silver carp also lives in the middle and upper layers of water and mainly eats phytoplankton;

Grass carp generally lives in the middle layer of water and mainly eats the stems and leaves of aquatic plants;

Black herring lives in the lower layer of water and mainly eats snails, mussels and other underwater animals. Mixed feeding of these four kinds of fish can improve the utilization rate of bait and increase the output of fish.

produce

Before the Tang Dynasty, carp was regarded as the most widely cultivated freshwater fish. However, because the surname of the Tang royal family is Li, the cultivation, fishing and sales of carp are prohibited. Fishermen have to engage in the production of other varieties, which has produced four major fish: green, grass, silver carp and bighead carp.

In the Northern Song Dynasty, the four major fish continued to develop into a wider regional culture, and the culture in the Yangtze River and Pearl River gradually flourished. According to the careful (1232 ~1298) records in Guixin Magazine, the capture, transportation, screening and sale of the fry of the four major fish have reached a professional level. Moreover, the mixed culture technology of four major fish came into being in the Song Dynasty, and it was rapidly popularized. Polyculture technology not only makes full use of aquaculture resources, but also enriches the product structure of fish farmers and reduces the risk of production.

main feature

The four major fishes belong to CYPRINIDAE and CYPRINIDAE. Because these four kinds of fish have the same characteristics of rapid growth and strong disease resistance, they are suitable for people to eat fish. Moreover, the growth inflection point age of the four big fish is 2-3 years older than their sexual maturity age, and they will continue to grow after sexual maturity.

Identification of four major fishes:

Grass carp is yellowish in color, with clear scales, flat head and blunt snout; The body and fins of herring are gray-black, with inconspicuous scales and sharp heads. Silver carp is silvery white, its head is smaller than that of bighead carp, and it has abdominal ribs from pectoral fin to anus, and its abdominal edge is curved in side view, and the tip of pectoral fin only reaches the base of pelvic fin; The bighead carp is black and slightly yellow, with a large head and a flat belly edge, and the tip of pectoral fin crosses the base of abdominal fin.

Identification method of "four major fishes"

"Four major fishes" refer to grass carp, herring, silver carp and bighead carp. At present, although the new species of fish are increasing day by day, the "four major fish" is still the main species of fish. In order to buy the appropriate "four big fish" species, we must learn to identify them.

The newly hatched larvae are generally called fry, fish flower, splash and so on. When it grows to 3.3 cm long, it is called a fish species. At this time, the "four big fish" species can be identified by the following methods: grass carp is yellowish in color, with clear scales, flat head and blunt and round snout; The body and fins of herring are gray-black, with inconspicuous scales and sharp heads. Silver carp's body color is silvery white, its head is smaller than that of bream, and it has abdominal ribs from pectoral fin to anus, and its abdominal edge is curved in side view, and the tip of pectoral fin only reaches the base of pelvic fin; The bighead carp is black and slightly yellow, with a large head and a flat belly edge, and the tip of pectoral fin crosses the base of abdominal fin.