面盘是贝类幼虫的游泳、呼吸及援食器官，健壮的幼虫都具有发达的面盘，依靠山盘纤毛有规律的摆动，形成水流，将海水中单细胞藻类等微小颗粒摆入口沟，进入胃、肠而消化吸收。但是，在贝类苗种生产中经常出现面盘纤毛脱落，并逐渐地全部脱落，使幼虫失去浮游能力而下沉死亡。 The face plate is the shellfish larvae swimming, breathing and feeding organs, robust larvae have developed face plate, rely on the mountain plate cilia regular swing, the formation of water, the seawater in the single-cell algae and other small particles placed in the ditch, Into the stomach, intestine and digestion and absorption. However, in the production of shellfish, the cilia of faceplate often fall off and gradually come off gradually, causing the larvae to lose their ability to float and sink to death.