原始腹足目，马蹄螺科，腹足纲，隐螺属。分布于中国海南岛;班达海,琉球群岛,印度洋,日本南部海域。主要栖息于热带珊珊礁海域,在亚热带海区,也有发现。
学名：Clanculus margaritarius
英文名：Bead hidden conch
This species belongs to the family of Trochidae,order of Gastropod.Distributed in Chinese Hainan Island; Banda Sea, Ryukyu Islands, the Indian Ocean, southern Japan waters.Mainly inhabits in the tropical sandy reef waters and in the subtropical sea.