Not long ago, Xiaoke went to Guangzhou on a business trip and tasted something with a particularly interesting texture called fried crispy basil. Although we know it is a fish, in order not to appear so ignorant, we dare not ask what kind of fish it is! But Xiaoke kept this in mind and went to find out more about it.

Guangdong is famous for its pursuit of fresh food. The sufficient water environment of the Pearl River Delta has enabled large-scale freshwater fish farming here. The four major species of fish, silver carp and bighead carp, provide sufficient, high-quality and cheap protein for the Chinese people. This sculpture standing on the street of Dongsheng Town, Zhongshan City, Guangdong Province attracts the attention of passers-by and makes foreigners who are new to this place curious about crispy meat huan. Among the four major species of carp, herring and grass carp are also called black catfish and grass carp. What kind of fish is crispy carp?

In fact, this kind of fish is not a special species. It is the grass carp that we commonly raise in fresh water, also called grass carp. Common grass carp eats a certain kind of special feed that makes the meat crispy. When people taste it, they will have obviously different feelings in terms of taste.

Grass carp turns into crispy grass carp, and the key to the problem is that mysterious feed. This is a farm that specializes in breeding crispy grass carp. The technical person in charge said that the grass carp in these ponds are undergoing crispy breeding. What the fish eat every day is the special feed that makes the fish meat crispy. The so-called special feed turned out to be ordinary broad beans. Broad beans are an annual herb. Many people like to cook them with rice to make broad bean rice. They are also a favorite snack for many people. But in fish farms, broad beans have become a special feed that makes fish meat crispy.

According to technicians at the farm, grass carp is fed broad beans only after it reaches three pounds, and enters a crisping period of about 100 days. After the fish reaches the desired crispiness, the fish are sent to the hanging pool in batches. The so-called hanging pool uses water that has been purified at two levels to raise embrittled grass carp. During this period, no feed, grass, or fish medicine was given. The fish only drink clear water in the pond. This is also what fish farmers often say to lose weight for their fish. After this process, the fish meat is not only crispy and delicious, but also removes the muddy smell that is often found in freshwater fish.

The Pearl River Fisheries Research Institute has carried out research on key technologies for grass carp quality improvement and breeding emission reduction, invented patented breeding technology and processing technology for grass carp quality improvement, and systematically constructed microbial community regulation technology for emission control during grass carp breeding. , creating a zero-emission model for reducing emissions during grass carp farming. Using this achievement can realize self-purification of the water system in the farm and zero pollution discharge. (This article is reproduced from Approaching Science. If you have any copyright issues, please contact wx@fishfirst.cn.)