1, the sea melon seeds is a kind of gray surface slightly fleshy red small clams. And sea bean sprouts hinge outline brachiopods, the shape of the shell tongue-shaped or long ovate. The shell is composed of chitosan, the shell wall is brittle and thin.

2, length is different. The length of the sea melon seeds is only 2 centimeters, like a nail, is a famous small aquatic products in Cixi, Zhejiang Province. Sea bean sprouts length in 30 centimeters, its flesh stem thick and long, can stick in the seabed cave dwellers, flesh stem can be free to stretch in the cave.