A cephalopod mollusk of the genus Nautilus, especially N. pompilius, found in the Indian and Pacific oceans and having a spiral, pearly-lined shell with a series of air-filled chambers.

• 鹦鹉螺一种鹦鹉螺属头足纲软体动物，尤其是蛛蜂鹦鹉螺，发现于印度洋和太平洋上，具有螺旋形珍珠线的壳，由一系列充满空气的层构成