It is normal that the surface of sea cucumber is white, because it belongs to seafood, and there will be a certain amount of salt in the body. These salts will form white crystals after drying and solidify on the surface of sea cucumber, which will make the surface of sea cucumber white, so white sea cucumber can be eaten normally.

In addition, if you want to make dry sea cucumber, the sea cucumber will add extra salt during the processing, so that the surface of the sea cucumber will be whiter.

Do fresh sea cucumbers have to be treated with salt? Salt is preferred for the following reasons:

1. Live sea cucumber contains a lot of water. Adding salt can use the osmotic pressure of sodium concentration difference to force out the water in sea cucumber, which will be more conducive to the processing of sea cucumber.

2. Salt also has a good sterilization and disinfection effect. Adding salt in the process of processing sea cucumber into dry sea cucumber can not only dehydrate, but also sterilize, thus prolonging the storage time of sea cucumber.

3. The salt layer on the surface of sea cucumber can isolate the air. As long as it is placed in a ventilated and dry place, the quality of sea cucumber can be guaranteed to remain unchanged for several years.

Why do sea cucumbers use pure water to make pure water? Pure water has soft texture and few impurities, which is more conducive to the soaking of sea cucumbers. For example, tap water is relatively hard and contains a lot of chloride ions. If tap water or blisters with insufficient purity are directly used, peeled sea cucumbers will appear, which will affect the edible taste of sea cucumbers, so they are generally soaked in pure water.

It depends on how long the sea cucumber is soaked.

Sea cucumber needs to be soaked in Takuwa, which is related to the drying of sea cucumber. If it is fresh sea cucumber, you don't need to soak it. Like ordinary dry sea cucumber, it needs to be soaked for about 2-3 days. Because dry sea cucumber is dried and dehydrated, its texture is dry and hard, and it is not easy to foam, and the water is changed every 6- 12 hours during foaming. Similarly, if the sea cucumber is seriously dry, it will take longer to soak it.