The red thing in the shrimp head is shrimp brain, which belongs to the brain tissue of shrimp. In fact, it is similar to crab roe, and it tastes rich and delicious. At the same time, the black lines on the back of prawns are commonly known as sand lines, which will have a fishy taste and can be removed when eating. Shrimp is a crustacean decapod.

Shrimp is distributed in China waters, rivers and lakes. Its abdomen flexes and stretches nimbly, and its tail paddles downwards and forwards, and it can jump backwards continuously at a very fast speed. They eat tiny creatures, some eat carrion, and they have beards, hooked noses, jointed back arches, and hard scaly feet at the tail, so they are good at jumping. The average size of shrimp is 4 ~ 8 cm, and it can swim backwards quickly by bending its abdomen and tail.