密线刺尾鱼，为辐鳍鱼纲鲈形目刺尾鱼亚目刺尾鱼科的其中一个种。

本鱼分布于印度洋－西太平洋区，包括印尼、菲律宾、新喀里多尼亚、关岛、马里亚纳群岛、威克岛、法属波里尼西亚等海域。

Acanthurus nubilus is an herbivorous tropical fish also known as the Bluelined surgeon or the Pin-striped surgeon. It was first named by Fowler and Bean in 1929, and despite being a rare species, is used in aquariums.