noun
warty frog shell
A species of sea snail, Bursa bufonia dunkeri. Technical term used in biology and shell collecting.
オキニシは、沖合の砂泥底に生息する巻貝の一種です。
The warty frog shell is a type of sea snail that lives on sandy-mud bottoms offshore.
The name likely derives from 沖 (offshore) and 螺 (spiral shell), referring to its habitat and shape. The exact origin is uncertain.