The black line on the abdomen of the shrimp is the abdominal nerve chain of the shrimp, which belongs to the central nervous system, mainly controlling the movement of the shrimp, and does not need to be removed. And the black line on the back of the shrimp is the shrimp intestine, shrimp line in the residue including undigested food, digested food residue, and metabolites, sediment, etc., so there will be an earthy flavor. But after high-temperature cooking, the microorganisms in the shrimp line will be killed, if not removed, it will affect the taste, but will not be too dangerous to health, although so, but it is best to remove the shrimp line when dealing with shrimp.
Pick the shrimp line is a very important process, in addition, in addition to picking the shrimp line in addition to the shrimp head in the white stuff to squeeze out, one is the shrimp brain, the other is the male shrimp will have a sperm nest because the shrimp brain is prone to accumulation of parasites is also a place where harmful substances are gathered, and fishy, so deal with the shrimp brain and shrimp sperm nests can be effective in removing the shrimp fishy flavor it, but also to ensure that the food is healthy.