Snail: shellfish. Babylonia, Mollusca, Gastropoda. There are spiral layers, each layer has a protruding shoulder angle, the front tube is long and slightly curved, the spiral center is long and the shell surface is brown. I like to live on the seabed with high salinity and lay eggs in July-August every year. Trawls along the Chaoshan coast are fished from time to time, but there are few resources and little gains. Available for export. Fishermen often use their shells as their numbers and have a loud voice, so they are called rattlesnakes. It is a famous nourishing yin seafood.