1, the family should raise it in a basin, and some fine sand can be put in the basin to form a small platform. Don't feed the water too deep. The best water depth is that water steel is soaked in crab shells, and the water to be fed can be tap water, but it can only be used after a day of sun exposure.

2, proper sun exposure, crabs can bask in the sun, but not for too long.

3. Crabs are omnivores. If possible, you can feed red nematodes and egg yolks. Of course, crabs can also eat chicken and duck viscera or small fish and shrimp. At the same time, feed some grass. Pay attention to your food intake and finish it in half an hour, otherwise the remaining food will pollute the raised water.

4. The feeding intensity of crabs increases and decreases with the change of seasons and water temperature. In summer and autumn, when the water temperature rises above 15℃, the crab's feeding ability is enhanced, so it is fed once a day. When the water temperature drops below 15℃, the feeding ability of crabs decreases, and they can be fed once every other day or several days. Feeding time should be around the evening, because crabs are aquatic animals, lying in the daytime and coming out at night.

5. Crabs are social animals. It is best to raise several crabs together, so the survival rate is higher.

6. Wash crabs. When cleaning crabs, hold them by hand, and then brush them with a toothbrush dipped in shower gel or soap, especially in the dead corner, and pull their feet (don't brush them too hard). Wash the fish tank with clean water after bathing and sprinkle some salt occasionally, mainly to prevent infectious diseases.

The prevention and treatment of crab diseases should focus on prevention, so as to achieve early detection, early treatment, early prevention and early treatment, and adopt different methods for prevention at different growth stages. Select microbial agents such as photosynthetic bacteria and EM bacteria to adjust water quality. Quicklime and dibromohydantoin are often used in high temperature season. In the high incidence period of ciliates, use 1 every 5-20 days to kill insects. In order to avoid drug resistance, drugs should be used alternately. Tremor disease is a microorganism between bacteria and viruses. Enema killing pool is an effective method to prevent and treat tremor.

Extended data

Crab (páng xiè): Animal kingdom, Arthropoda, Crustacea, Soft Crustacea, True soft armor Subclass, Decapoda, Gastropoda, Anura. It is a crustacean. Its body is protected by a hard shell and breathes through its gills. Taxonomically, it is the same kind of animal as shrimp, lobster and hermit crab.

Most kinds of crabs live in the ocean or offshore areas, and some live in fresh water or land. They rely on the mother crab to give birth to small crabs, and every time the mother crab will lay a large number of eggs, the number can reach more than one million. Crabs rely on the geomagnetic field to judge their own direction. The amount of genetic material of this kind of organism is complex and varies greatly, often as many as 100 pairs. Common crabs are hairy crabs (river crabs, hairy crabs, clear water crabs) and swimming crabs. China is rich in crab resources, among which the hairy crabs produced in Gucheng Lake, Taihu Lake, gaoyou lake, Yangcheng Lake, Xiefu, Xinghua and Hongze Lake in the lower reaches of the Yangtze River are the top grade.

2018 March 15, CCTV 3. 15 party's first consumption warning was released. Arsenic in crabs and tomatoes in human gastric juice will not be converted into arsenic.

References:

Baidu encyclopedia entry crab