Because the cost of breeding herring is high and the cycle is too long (about three years) compared to other fish, the risk of breeding herring is getting higher and higher (it is very likely to become a loss-making business). It is precisely because of the above comprehensive factors that the value of herring is getting higher and higher, and most groups are unwilling to pay high prices and tend to buy herring. After all, you can buy other varieties of fish with delicious meat at the same price, so refusing to buy herring will result in herring not being sold in the market.

Herring usually lives in the middle and lower layers of the water and is inactive by nature. Its main food sources are snails, mussels, clams, clams, etc. It also occasionally preys on shrimps and insect larvae. Mainly distributed in China, Russia, Vietnam, Albania, Armenia, Austria, Bulgaria, Costa Rica, Cuba, Czech Republic, Hungary, Japan, Kazakhstan, Latvia, Malaysia, Mexico, Moldova, Morocco, Panama, Serbia, Slovakia, Thailand, Turkmenistan , Ukraine, United States, Uzbekistan. Herring is one of the four traditional freshwater cultured fish species in China.