violet snail
(亦作violet sea snail)
noun
1- a small marine snail which drifts on the surface of the sea attached to a raft of bubbles. The shell is typically purple-violet and the animal emits a violet fluid when attacked.海蜗牛。
1.1
- Family Janthinidae, class Gastropoda.海蜗牛科, 腹足纲。