How can I raise crabs day by day? The blue crabs are anxious!

Put some salt in the water and keep it in the shade. The blue crab is mainly carnivorous, and likes to eat small miscellaneous shellfish, small miscellaneous snails, small miscellaneous fish, small miscellaneous shrimps and small miscellaneous crabs. Blue crab is also a sea crab in Guangzhou salt. The suitable salinity for culture is 7 ‰ ~ 33 ‰, the optimum is 10 ‰ ~ 20 ‰, the optimum temperature range is 6℃ ~ 35℃, and the optimum growth water temperature is 18℃ ~ 25℃. At this time, the blue crab is active and has a strong appetite.

The blue crab is a wide-temperature aquatic animal, and its living temperature limit is 7-37. The optimum growth temperature is 18-32. The optimum water temperature is 18-25. At this time, the blue crab has strong activity ability, strong appetite and large appetite. China is distributed in the north and south seas, especially in Ninghai County, Zhejiang Province, where the breeding area of blue crabs is as high as 6.5438+0.2 million mu, which is the "city of blue crabs" in China and 88,000 mu in Sanmen County, which is the "hometown of blue crabs" in China.

Extended data:

Living habits of blue crabs;

Blue crab is a swimming crab that lives on the beach. It burrows during the day and forages around at night. Especially on the night of high tide, it is more active because of its clear eyes and sensitive tentacles; In summer, the activities of blue crabs are more frequent. When the low tide is shallow, the mud bottom often hides for the summer. Sometimes you can see groups of blue crabs propping themselves up with their feet, leaving the hot beach and enjoying the cool in the dry heat.

There is no activity in winter. When the weather is cold, burrows are dug near the low tide for winter. The size and depth of caves deepen with the increase of individual size and tidal zone, and sometimes the caves in the high tide zone can reach more than 1 meter. In the water, the blue crab moves to the left and right by the frequent paddling of the last pair of feet, but in most cases it drifts with the current and can quickly retreat when it is frightened or meets obstacles. It crawls on the beach surface with its feet, feeling sensitive and moving freely.