Crayfish Green 345 refers to the varieties of crayfish, including 3 yuan, 4 yuan and 5 yuan, and refers to shrimps from 3-5 yuan, with the weight unit. 33 -20 per catty.

Crayfish Red 567 refers to the red shrimp variety of crayfish, including 5 yuan, 6 yuan and 7 yuan, and refers to the shrimp of 5-6 yuan, with the weight unit. 20- 14 per catty.

The price of each grade is different, and green shrimp is cheaper than red shrimp.