阔船蛸（中国大陆称锦葵船蛸，学名：Argonauta hians）也称舡鱼，属头足纲船蛸科。

通俗名称源自于褐白色的卵盒，中国广东地区称呼它为「灰海马巢」。本物种的雌性，就像所有船蛸一样，制造薄纸般的卵盒以利于章鱼盘绕在内，就这方面来说很像是只鹦鹉螺居住在它的贝壳里（由此而得到一个称呼：「纸鹦鹉螺」）。卵盒具有宽阔的龙骨，带给了它方形外观的特征，少量圆形的结瘤顺着龙骨分布，并且较少有超过 40 条平滑纹脉横越卵盒的侧边。卵盒全长通常是在大约 80 毫米，然而例外的标本可以超过 120 毫米；世界纪录尺寸是**产的 121.5 毫米标本。

Argonauta hians, also known as the winged argonaut, muddy argonaut or brown paper nautilus, is a species of pelagic octopus. The common name comes from the grey to brown coloured shell. The Chinese name for this species translates as "Grey Sea-horse's Nest". The female of the species, like all argonauts, creates a paper-thin eggcase that coils around the octopus much like the way a nautilus lives in its shell (hence the name paper nautilus). The eggcase is characterised by a wide keel that gives it a square appearance, few rounded tubercles along the keel, and less than 40 smooth ribs across the sides of the shell. The shell is usually approximately 80 mm in length, although it can exceed 120 mm in exceptional specimens; the world record size is 121.5 mm.