King Scallop

King Scallop

　　A large scallop species with a shell height of up to 8 cm, length of 9 cm, and width of 8 cm. The shell is solid, thick, obliquely oval, and highly inflated. The two valves are nearly equal in size. The dorsal margin is straight, the sides form blunt angles, the anterior and ventral edges are rounded, and the posterior end extends. The shell surface has 42–48 radial ribs, most commonly 43. These ribs are relatively flat, with no obvious nodules or protrusions. The concentric growth lines are slightly scaly along the ventral edge. The shell surface is white, covered with brown velvety periostracum, and some rib grooves appear dark brown. The inner surface of the shell is grayish-white, with hairy margins and toothed edges. The hinge is straight, with approximately 70 hinge teeth.