It is mainly distributed in rivers and lakes in China, such as the Yangtze River and the Pearl River. Macrobrachium nipponense belongs to decapod, which is an important economic aquatic product and edible shrimp. Macrobrachium nipponense belongs to freshwater shrimp, which adapts to the freshwater environment and lives in freshwater lakes, rivers and reservoirs. The living habits and ecological characteristics of Macrobrachium nipponense are obviously different from those of marine shrimps, such as adaptability to salinity, breeding methods and so on. Therefore, it can be determined that prawn is a kind of freshwater shrimp.