It is not normal for Changshu crabs to go ashore in groups. The reason why crabs go ashore is that the environment in the water has changed, making it difficult for them to stay. Thousands of crabs have landed, although it is a good thing for local residents, and pure wild Yangtze hairy crabs can be eaten, but the relevant local departments should thoroughly investigate why crabs have landed. Only a detailed investigation can make it clear whether there is an ecological problem. If there is an ecological problem, actively intervene to adjust the ecology, so as not to let the ecology continue to deteriorate and let the Yangtze River hairy crab have a place to go. There will be thousands of Eriocheir sinensis ashore, which will not be spontaneous. It is mostly because the water makes them feel unable to stay any longer that the crabs will go ashore to find another habitat. When looking for reasons, you can look for them in the following directions:

1, is the water temperature suddenly rising or falling?

You should know that Eriocheir sinensis likes a constant temperature environment. In a relatively stable environment, Eriocheir sinensis will stay in one place more stably. If the water temperature is too high or the water temperature suddenly drops below five degrees, Eriocheir sinensis will choose to leave its original environment and choose another habitat.

2. Is there any pollutant in the water?

You should know that Eriocheir sinensis has very strict requirements for water quality. When the water quality is obviously polluted, Eriocheir sinensis will choose to go ashore to avoid the bad living environment.

3. Oxygen in the water drops sharply.

As we all know, when buying seafood, vendors usually flush the seafood with oxygen. If they don't flush oxygen, crabs will soon die. Therefore, it is very likely that Eriocheir sinensis will go ashore because of the sharp drop of oxygen in the water, and crabs will choose to go ashore to escape because of lack of oxygen.

In a word, it can be concluded that the phenomenon of Changshu crabs coming ashore in groups is not normal, but abnormal. However, these wild Eriocheir sinensis ashore can be eaten. You can pick up these wild Eriocheir sinensis and go home to cook them in various ways.