Brine shrimp are river shrimp. Brine shrimp is a Jiangsu delicacy whose main ingredient is river shrimp. This dish focuses on the freshness and deliciousness of shrimp. It is made by stewing in salt water, which is low in oil and healthy. The characteristic of brine shrimp is its bright red appearance, tender and refreshing taste. River shrimp, whose scientific name is Macrobranchium nipponense, is a high-quality freshwater shrimp. Widely distributed in rivers, lakes, reservoirs and ponds in my country, it is favored by consumers for its tender meat, delicious taste and rich nutrition. River shrimps are small in size, with an oval body, a slightly curved back, and a large head with two pairs of antennae and a pair of compound eyes. The body is divided into three parts: head, thorax and abdomen. The head and thorax are combined into a carapace with 10 pairs of legs and 5 pairs of gills. The body shape and color of river shrimp vary depending on the species. For example, the legs of red-footed river shrimp are red or orange, the legs of orange-clawed river shrimp are orange, and the legs of Ezo crab are black.