Flower nails can be opened and closed. Generally speaking, the flower nail will tightly close its shell when it is short of water or frightened, but when it is full of water or when it is sure that there is no danger around it, it will reopen its shell and stretch out its tentacles to breathe. Therefore, it is impossible to tell whether it is a flower nail simply by opening and closing the mouth.
When choosing flower nails, you can choose those flower nails that open their shells and extend their tentacles. If you touch it, you can take it back immediately, that is, flower nails.
Will it kill you to soak in the flower armor all night? It depends.
Huajia lives in shallow water, and its survival time in fresh water is very short, so if it is simply soaked in clean water or tap water, Huajia may die.
If you want to soak the flower nail overnight, you can't soak it in clear water. Instead, it is necessary to simulate the living environment of the flower armor and soak it in salt water. This can not only ensure that the flower nail will not die, but also make the flower nail spit out sediment. But when the temperature is too high, it is recommended to put it in the refrigerator, and the salt water should be replaced in time to avoid death due to lack of oxygen.
It depends on how long the flower nail will soak before it opens.
When the flower nail is short of water or feels dangerous, it will automatically close its shell to avoid injury, but when the water is sufficient or the environment is safe, it will automatically open its shell and stretch out its body and tentacles to breathe, so the opening time of the flower nail after soaking is uncertain.
Under normal circumstances, the flower nail will be put into the well-proportioned salt water, and then a few drops of sesame oil will be added. When it stands for an hour or so, most of the flower nails will stretch out their bodies and tentacles to breathe and spit sand.
What happened to Hua Jia drowning? It may be dead.
Under normal circumstances, after high-temperature blanching, the protein of the flower shell will denature, lose the ability to close, and thus open the shell. If there is no opening, it means that the flower nail may have died before blanching.
But it may also be caused by improper blanching method or insufficient blanching time. When ironing flower nails, put cold water into the pot and cook until the flower nails are all open, then take them out and drain them, then clean them and cook them.