Meretrix meretrix (pinyin: wén-gé), also known as Meretrix meretrix (Gé -lí), belongs to the phylum Mollusca, Claudiobranchia, Heterodonta and Cladocera. Famous local clams, yellow clams and sea clams. The rear edge of the shell is slightly triangular, the belly edge is round, the two shells are equal, the edges are not equal, the shell length is slightly larger than the shell height, and the shell is firm and thick; The top of the shell protrudes slightly forward, the crescent surface is long and narrow, and the outer ligament protrudes from the shell surface in dark brown; The shell surface is swollen and smooth, covered with a layer of yellow-brown shell skin, with clear growth lines, annular brown belt, serrated or corrugated brown lines. Meretrix meretrix is a kind of buried shellfish, which is mostly distributed in the intertidal zone of coastal inner bay near the flat estuary and in the fine sand and mud beach in shallow sea area.