Scallops are mollusks belonging to the family of sea clams in the order of pearl oysters. The shell is relatively large and nearly circular; Straight back edge; Top of the shell near the middle of the dorsal edge; Having ears on both sides, most species have unequal ears on both sides; Generally, there is a pedis foramen below the anterior ear of the right shell, and its ventral edge has several small comb teeth; Shell surfaces often have radiating ribs of various shapes, with scales or small spines on the ribs; The growth pattern is fine and regular. The shell colors are diverse; The complexion inside the shell is light and slightly glossy, often with internal ribs corresponding to the shell surface, and obvious muscle scars; The inner ligament is brown and located in the triangular ligament groove. The coat has a thick edge, developed coat eyes and tentacles, and no water pipes.