The external structure of SINONOVACULA SINONOVACULA is as follows: the soft body is covered with mantle and shell, and the moving organ is foot; A mollusk with two calcareous shells of similar size.

Lamarck is a mollusk belonging to the genus Sinonovacula of Sinonovaculaceae. The razor clam shell is rectangular, round at both ends, about 4 ~ 8.5 cm long, with the top near the front and obvious growth lines. The two shells are equal, the shell surface is yellow-green, often worn out and white. It lives in soft sediments near estuaries and shallow inner bays with a small amount of fresh water injected.

The respiratory organ of SINONOVACULA constricta is gill, and the motor organ is foot. SINONOVACULA constricta is a mollusk and a bivalve. We can observe its internal structure by cutting its mantle with a knife. The internal structure is as follows:

Molluscs have soft bodies and usually have hard shells, and their bodies are hidden in the shells for protection. Because shells can interfere with activities, they move quite slowly. Without segmentation, it can be divided into three parts: head, foot and visceral mass, and there is an outer membrane outside the body. Shell, outer cover, feet, gill, water inlet pipe and water outlet pipe. SINONOVACULA SINONOVACULA is a mollusk with a hard shell.