noun
flower urchin
A species of sea urchin (Toxopneustes pileolus) known for its venomous pedicellariae. The name refers to its trumpet-like shape.
ラッパウニは暖かい海に生息している。
The flower urchin inhabits warm seas.
ラッパウニの棘には毒があるので注意が必要だ。
Be careful, as the flower urchin's spines are venomous.
Compound of 喇叭 (rappa, 'trumpet') and 雲丹 (uni, 'sea urchin'), referring to its trumpet-like shape.