Shell column is the scallop opening and closing shell muscles, shells are mostly disk or circular fan-shaped, shell top before and after the ear, two ears equal or unequal, most right shells have obvious foot filament holes and fine pectinate teeth below the front ear.

Shells with radial ribs or concentric lamellar sculpture, obvious closed-shell muscle scars, simple outer coat scars, no water tubes; inner ligament, located in a triangular ligamentous groove below the shell top.

Scallop is China's northern coast of the important culture of shellfish, production is very large, high economic value, scallop column of dried products known as "dried shellfish", for the valuable sea treasures. In addition to a few species, mostly inhabiting the low tide zone to hundreds of meters of shallow sea, camp attached or free life, mainly to mayfly algae for food.

Expanded Information:

There are many types of scallops, and there are about 45 species of scallops distributed along the coasts of our country, of which the most common and economically important scallop species mainly include pectinophorus scallop, bay scallop, ezoic scallop, and huagui pectinophorus scallop.

Scallops have long been one of the important species of marine aquaculture in China, and China's scallop production comes mainly from aquaculture, with very little capture production.

In the northern coast of China, the growth of a larger number of higher yields, for the important farming and fishing objects, its shell is more beautiful, can do shellfish carving and other crafts raw materials, the fleshy part can be freshly eaten, the closed-shell muscle is large, can be processed into dried shellfish or frozen products, best-selling at home and abroad.