Sea melon seeds are also called thin shell and plum clam. There are no other varieties. Musculussenhousei (scientific name: Musculussenhousei): Also known as sea melon seeds or thin shells, it is a shellfish seafood. It is a light-colored small clam with a small shell, slightly triangular, with a shell length of 17-24mm and a shell height of approximately 9-12mm, the shell height is slightly larger than the shell width 6-8mm. The shell is thin and transparent. The top of the shell is located on the dorsal side near the front end, and the distance to the most front end is about 1/4 of the dumpling. The ventral edge is straight, the middle part is slightly concave, the two shells are extremely expanded, and the surface of the shell is yellowish brown or greenish brown. There are brown or purple-brown radial patterns and wavy patterns on the trailing edge. The inner surface of the shell is off-white with a pearly luster. They live in tidal flats in outer bays or islands with high salinity, and live in groups. They lay eggs and reproduce from August to September every year. The meat is delicious and nutritious. It is one of the wild edible shellfish for coastal people. Distributed on both sides of the Pacific Ocean. Widely distributed on the tidal flats along the north and south coasts of China.