Scallops, also known as mussels or razor clams.dry prepared are called"Oysters".They are found in the southern East China Sea and South China coastal areas.The shell is large, with a length of 13-14 centimeters.The shell length is twice the shell height.The shell apex is located at the front end of the shell, and has a beak.The back margin is arched, while the ventral margin is straight or slightly concave.The shell is thin with a smooth surface, predominantly emerald green, with the anterior part often appearing brownish-green. The growth lines are fine, and the front end has an elevated ridge.The inner surface of the shell is porcelain white or slightly bluish-gray with a pearl luster.There are 2 ligament teeth on the left valve and 1 on the right valve.The foot threads are thin and soft, pale yellow.