First, soak the clam in water, and then put in a kitchen knife or other iron tools, and the clam will spit out the sediment, which usually takes 2 to 3 hours. The black part is the viscera area of the clam, and then the viscera of the clam can be removed by hand.

Meretrix meretrix belongs to Mollusea, Bivalvia, Heterodonta, Veneroida, Mactroidea and Mactridae. There are warm water species and hot water species in this family, which are distributed in all oceans of the world. More than 3 species have been found in China's coastal areas, most of which live in the middle and lower intertidal zone and the shallow sea bottom within 1 meters of the subtidal zone, and a few can live in the deep sea more than 1 meters, living in caves. Clam animals have high economic value, tender and delicious meat and rich nutrition, and are also the main species of beach culture in China.