Macrobrachium rosenbergii, also known as Malaysian prawn and freshwater brachiopod prawn, is a large freshwater prawn, which is native to Southeast Asia. It has the advantages of fast growth, wide eating habits, good meat nutrition and short breeding cycle. Since the artificial culture of Macrobrachium rosenbergii began in 1960s, it has developed rapidly, and now it is widely cultivated in Southeast Asian countries and other regions.

This kind of shrimp was introduced from China 1976, and has been planted in more than ten provinces, cities and autonomous regions such as Guangdong, Guangxi, Hunan, Hubei, Jiangsu, Shanghai and Zhejiang, with an average yield of 70 ~ 100 kg per mu, which has achieved obvious economic benefits.

Morphological characteristics:

Body hypertrophy, blue-brown. Each abdomen has 1 pair of appendages, and the tail appendages become tail fans. The head and chest are thicker, and the abdomen gradually tapers backwards. The head and chest are composed of 6 head segments and 8 chest segments, which are surrounded by a shell. There are seven abdominal segments, each of which is surrounded by a shell. Each joint has 1 pair of appendages, which varies greatly. From front to back, there are two pairs of antennae, three pairs of jaws, three pairs of jaws, five pairs of walking feet, five pairs of swimming feet, 1 pair of tail fans. Adult shrimp individuals are generally more male than female, and the largest male individual can reach 40 cm in length and weigh 600 g; The female can reach 25cm in length and 200g in weight. The male's second foot is very big and blue.