paper r nautilus贝葵
The Paper Nautilus纸鹦鹉
N（名词） any cephalopod mollusc of the genus Argonauta, esp A. argo, of warm and tropical seas, having a papery external spiral shell: order Octopoda (octopods) 贝葵; 生于暖和的和热带海域，有纸一样的螺旋形外壳 (Also called argonaut) → compare pearly nautilus