Sea cucumber is a common type of seafood. Because it is very nutritious, it is listed as one of the eight treasures of the sea. It has high protein content and is easily digested and absorbed by the human body. It is rich in lipids and mostly unsaturated fatty acids, which is extremely beneficial to the nutritional balance of the human body. There are many types of sea cucumbers, but generally speaking they can be divided into two categories, namely thorny sea cucumbers and thornless sea cucumbers. Among the sea cucumbers, sea cucumbers and plum blossom ginseng are better, while among sea cucumbers without sea cucumbers, sea cucumbers are better. The price and quality of different types of sea cucumbers vary greatly. Therefore, when purchasing sea cucumbers, in addition to going to a reputable aquatic product wholesale market, it is best to master some common sense to identify the quality of sea cucumbers: 1. The body shape is complete and correct. This is very important as it speaks to the freshness and quality of the sea cucumber. Incomplete sea cucumbers are often left after vendors remove the rotten parts; in addition, distorted and shriveled sea cucumbers indicate that the sea cucumbers have been harvested for a long time. Such sea cucumbers are easily contaminated by microorganisms and cause deterioration; 2. Dry enough, that is, the water content is less than 50%. . Since sea cucumbers are expensive, the lower the water content, the more affordable they are. In order to seek high profits, some merchants often add too much water to sea cucumbers. This not only causes consumers to suffer in price, but also the high water content is conducive to the growth and reproduction of microorganisms and is not conducive to the preservation and quality preservation of sea cucumbers. 3. Light, strong and shiny. Whether it is firm and shiny indicates the nutritional richness of the sea cucumber. Sea cucumbers that survive in sea areas with abundant food grow and mature, have high nutrient content, and naturally have high value; 4. They are uniform in size and have no sand in their belly. In order to make huge profits, some traders use illegal methods to fill the bellies of sea cucumbers with sand to increase their weight.