This cover is called the operculum, when in danger, the soft head and feet of the conch can be shrunk into the hard shell, shrunk, the operculum will be the snail shell closed to play a protective role.

Sea snail is a mollusk gastropod mollusc phylum, the world has more than 70,000 kinds of sea snail, sea snail is rich in protein, vitamins and essential amino acids and trace elements, is a typical high-protein, low-fat, high-calcium natural animal food, Shandong and Liaoning are especially rich in sea snail, every time to seafood season, weekends to buy a pot of sea snail to feast, attention to eating sea snail must be alive, sea snail! is one of the northeast people's favorite seafood, seafood season conch price is not expensive. Generally more than ten dollars, up to more than twenty dollars, the common conch in the Northeast, red conch, big conch, etc., Liaoning to the most popular fragrant conch, red conch, followed by; there are big conch, flower snail, mud snail, navel snail, Gou's beach snail, small moon snail, etc., and so on.