crayfish can breed all the year round, with the peak period from May to September.

The breeding of crayfish is quite special, and most of the breeding process is completed in caves, so it is difficult to see egg-bearing shrimps in ordinary production.

Procambarus clarkii, commonly known as crayfish and freshwater crayfish, is also called "Red Swamp Crayfish".

originally from north America, it was introduced to China from Japan in 193s, and now it is widely distributed in more than ten provinces and cities in China, forming a natural population that can be used. Especially in the middle and lower reaches of the Yangtze River, the biological population is large, which is the main producing area of Procambarus clarkii in China.

The specific breeding process of crayfish is as follows:

It takes 2 to 5 months for the ovaries to finally mature after mating, and ovulation and fertilization are carried out.

The fertilized egg is purple sauce color, which adheres to the bristles of swimming limbs in the abdomen. Shrimps with eggs often keep their abdomen close to the water in the cave to keep the eggs moist.

The fecundity of crayfish is small, generally ranging from 1 to 7 eggs, with an average of 3 eggs.

The incubation time of eggs is 14 ~ 24 days.

crayfish larvae don't need any external nutrition supply during their development, and the newly hatched larvae need to stay in the belly of the parent shrimp for about 1 days before they leave the mother.

If the conditions are not suitable, you can survive in the cave for several weeks without eating or drinking.

When the pond is flooded, the larvae and the parent shrimps crawl out of the cave one after another and naturally distribute in the pond. Sometimes the parent shrimps bring their larvae into the water and then release them.

Although crayfish hold fewer eggs, the survival rate of larvae hatching is very high. The scattered breeding habits of crayfish limit the large-scale production of fry and bring adverse effects on intensive production.