Grass shrimp, the scientific name of the spotted shrimp, also known as the black shell shrimp, belongs to the shrimp family. Because the shrimp like to inhabit the water and grass places, it is called grass shrimp. Grass shrimp with fast growth, miscellaneous food, wide salinity, short breeding cycle, large individuals, meat flavor, nutrient-rich, adult shrimp production and high characteristics. Grass shrimp, shrimp family. Frontal angle tooth type 7 ~ 8/2 ~ 3. Cephalothoracic armor with antennal spines, liver spines and gastric teeth, no frontal gastric ridge, the liver ridge is obvious and straight. Lateral frontal horn sulcus short, posteriorly exceeding but not the middle of the cephalothoracic armor. Fifth step foot without external limbs. The body consists of dark green, dark brown and light yellow transverse spots interspersed, constituting a brightly colored mottled pattern on the abdomen.