The inner surface of the shell is grayish white, with blue edges and pearl luster. The hinge is long, and the ligament is dark brown, almost as long as the hinge. Articulated teeth are underdeveloped, and then obturator internus degenerates or disappears. Feet are small and soft. Mytilusedulis (scientific name: Mytilusedulis), also known as Haihong and Qingkou, is cooked and processed into dried mussels, which are bivalve mollusks with dark brown shells and live on coastal rocks. Distributed in the Yellow Sea and Bohai Sea coasts of China. Mussel shells are wedge-shaped, with tapered front ends and wide and round back ends. Generally, the shell length is 6 ~ 8 cm, and the shell length is less than 2 times of the shell height. Thin shell. The top of the housing is near the front end of the housing. The two shells are equal, symmetrical, and the surface is purple-black and shiny. The growth line is thin and obvious, and it grows annularly from the top.

Fresh mussels are popular seafood. It can be steamed or peeled and fried with other vegetables. It's delicious. Due to the large output of mussels, it is not easy to preserve after harvesting, and it has always been cooked and processed into dried mussels. Mytilus edulis has high nutritional value and certain medicinal value. Note: Mytilus edulis is an export variety, and its English name is Mussel. Export areas: Europe (trial sale) and Hong Kong and Macao. Export ports: Shandong and Liaoning.

According to the analysis, every100g of fresh mussel meat contains protein10.8g, sugar 2.4g, ash 2.4g, fat10.4g, and the protein content of dried mussel meat is as high as 59.3%. Mussels also contain various vitamins and trace elements such as manganese, zinc, selenium and iodine, which are essential to human body. It is worth mentioning that the nutritional value of mussels is high because their protein contains eight essential amino acids, such as valine and leucine, which are much higher than those of eggs, chickens, ducks, fish, shrimp and meat. According to another study, mussel fat also contains essential fatty acids, and its saturated fatty acid content is lower than that of pigs, cattle, mutton and milk, and its unsaturated fatty acid content is relatively high. Known as the egg in the sea.