The Mussel, or emerald mussel, is also known as the "sea rainbow" in parts of the Bohai Sea (although the term is used as a name for a crab in the Tianjin area). When dried, it is "mussels". Distributed in the southern East China Sea and South China Sea coast, Bohai Sea area. Often lives in the intertidal zone to the bottom of the shallow sea, in addition to rocks in the seaside, can also be found in driftwood, boat bottom and other places.