Yes, it is.
Black mussels are mussels, emerald mussels (Mussel), also known as "sea rainbow" in some parts of the Bohai Sea.
The nutritional balance of mussels is rich in various amino acids, unsaturated fatty acids, inorganic elements and other nutrients necessary for human life activities, including taurine, EPA, DHA and selenium, and other biologically active substances on the body has an important function of anti-disease, detoxification, and enhancement of immunity, which is of high value for development and utilization.
Morphology and structure
Shellfish's body is soft, symmetrical, not divided into sections, by the head, axe foot, visceral sac, the coat membrane and the shell of five parts. The head bears sensory organs such as mouth, eyes and antennae.
The axe-foot is on the ventral side of the body and consists of strong muscles, which is an organ for crawling, digging mud and sand or swimming. The integumentary sac is located on the back of the body and includes internal organs such as the heart, kidneys, stomach, intestines, digestive and reproductive glands. The coat membrane is encapsulated on the outside of the body and consists of two layers of epidermis and connective tissue and a little muscle between them. The epidermal cells of the coat membrane secrete shells, and both the coat membrane and shells are protective organs of shellfish.
Reference: Baidu Encyclopedia-Shellfish
Reference: Baidu Encyclopedia-Shellfish