It takes 12 months for shrimp to mature sexually. The time for selecting parent shrimp is generally in September-October of the previous year or March-April of that year. The source should be fished directly from the pond or natural waters where lobster is cultured. The time for parent shrimp to leave the water is generally no more than 2 hours.

The female-to-male ratio varies according to different reproductive methods, which is generally 2: 3 ∶ 1.

The individual is large, and the weight of both male and female should be at 30ml 50g. It is best that the male individual is larger than the female individual.

Both female and male parent shrimps require complete appendages, no damage, strong physique and strong mobility.

Dark red or dark red, shiny, smooth body surface without attachments