Longshan yellow snail is a traditional famous dish of Han nationality in Ningbo, Zhejiang Province. It has a long head, yellow body, fat body and a particularly delicious taste. Mud snails, commonly known as "spitting iron" and "plastering", live in shallow cement beaches and are covered with mud. Bullacta exarata is rich in protein, calcium, phosphorus, iron and vitamins, and it is a popular seafood with delicious taste and high nutritional value.