Macrobrachium rosenbergii, also known as Penaeus Malaysia and Macrobrachium freshwater prawn, is a large freshwater prawn, native to Southeast Asia. It has the advantages of fast growth, wide eating habits, good meat nutrition and short breeding cycle. Macrobrachium rosenbergii has developed rapidly since artificial culture began in 1960s. At present, it is very common to cultivate Macrobrachium rosenbergii in Southeast Asian countries and other regions.

This kind of shrimp was introduced from China 1976, and has been cultivated 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, bluish brown. Each abdomen has 1 pair of appendages, and the tail appendages change into tail fans. The head and chest are thick, and the abdomen gradually tapers back. 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 tentacles, three pairs of jaws, three pairs of jaws, five pairs of walking feet, five pairs of swimming feet and 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.