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Is crayfish shrimp?

Crayfish is shrimp.

Crayfish (scientific name: Procambarus clarkii): It is an aquatic animal of Crustacea, Decapoda and crayfish. Crayfish usually carry paragonimiasis, also known as Procambarus clarkii, red crayfish and freshwater crayfish. Shaped like a shrimp with a hard shell The adult is about 5.6- 1 1.9 cm long, dark red, with nearly black carapace and wedge-shaped stripes on the ventral back. Young shrimps are evenly gray, sometimes with black ripples. Long and narrow claws. The middle part of the carapace is not separated by a mesh gap, and there are obvious particles on the carapace.

Crayfish is a kind of freshwater economic shrimp, which is widely welcomed by people because of its delicious meat. Because of its omnivorousness, fast growth and strong adaptability, it has formed an absolute competitive advantage in the local ecological environment. Its foraging range includes aquatic plants, algae, aquatic insects and animal carcasses.

Culture mode of crayfish

Crayfish can breed all year round, and the peak period is from May to September. Crayfish are hermaphroditic and have obvious secondary sexual characteristics. It can be distinguished from the shape of abdominal swimming limbs. The first abdominal swimming limb of male shrimp is specialized as mating thorn, and the first abdominal swimming limb of female shrimp is specialized as sperm hole. Secondly, there are obvious differences between the two pliers. The male claw is thick, and there are bright red warts on the outside of both ends of the claw, while the female claw is small and the warts are not obvious. Thirdly, the claw feet of male shrimp are bigger than that of female shrimp, and the individual is bigger than that of female shrimp.

The ovarian development of crayfish lasts for a long time. Usually, after mating, depending on the water temperature, the ovaries need to develop for another 2-5 months to mature. In the production, we can observe the connection between the breastplate and the abdomen, and judge the degree of gonad maturity according to the color of the ovary, and divide the ovarian development into pale, yellow, orange, brown (brown) and dark brown (bean paste color) stages. Among them, the lighter color is the gonad of immature shrimp, which is smaller and takes several months to reach maturity.

The above contents refer to Baidu Encyclopedia-Crayfish.