船蛸属（拉丁语：Argonauta；船蛸科中唯一的现生属），是一类远洋章鱼。牠们也被称为「纸鹦鹉螺」，指的是唯有雌性个体才能分泌的超薄卵盒，该构造与现在的鹦鹉螺不一样，船蛸缺少填充气体的腔室，亦并非真正的头足纲贝壳。然而更确切地说，这项发展对船蛸而言是独特的创新。

船蛸可见于全世界的热带与亚热带海域，栖息在开放水域。如同许多章鱼一样，牠们具有近圆球形的身体、八只腕足而不具备肉鳍。不过，和一般章鱼不同的是，船蛸生活在海水表层而不是在海床上。本属物种具有较大的眼睛与较小的末端网状组织的特征。漏斗和外套膜闭锁器是该分类单元的一项主要的判断特征，它在外套膜是以似结瘤的软骨所构成，并且在漏斗处一致下降。船蛸缺少水孔，这点也与近缘关系的快蛸属与水孔蛸属相异。

The argonauts (genus Argonauta, the only extant genus in the family Argonautidae) are a group of pelagic octopuses. They are also called paper nautiluses, referring to the paper-thin eggcase that females secrete. This structure lacks the gas-filled chambers present in chambered nautilus shells and is not a true cephalopod shell, but rather an evolutionary innovation unique to the genus Argonauta. It is used as a brood chamber and for trapped surface air to maintain buoyancy. It was once speculated that the argonauts did not manufacture their own eggcases but instead borrowed them from other organisms, in the manner of hermit crabs. Experiments by pioneering marine biologist Jeanne Villepreux-Power in the early 19th century disproved this hypothesis, as Villepreux-Power was able to successfully rear argonaut young and observe the development of their shells.