necklace shell
noun
1- a burrowing predatory mollusc which drills into the shells of, and feeds upon, burrowing bivalves. It lays a mass of eggs that resemble a string of beads.玉螺。
1.1
- Genus Naticat, family Naticidae, class Gastropoda.玉螺属, 玉螺科, 腹足纲。