褐斑刺尾鱼，又称褐斑刺尾鲷，俗名薰衣草倒吊，为辐鳍鱼纲鲈形目刺尾鱼亚目刺尾鱼科的其中一个种。

本鱼分布于印度太平洋海域，包括红海、东非、毛里求斯、塞舌尔、马达加斯加、马尔代夫、斯里兰卡、印度、日本、**、菲律宾、印尼、马来西亚、新几内亚、澳洲、帕劳、密克罗尼西亚、马里亚纳群岛、夏威夷群岛、新喀里多尼亚、马绍尔群岛、所罗门群岛、瑙鲁、斐济群岛、法属玻里尼西亚等海域。

Acanthurus nigrofuscus, also known as the Lavender tang, Brown Tang, or Spot-Cheeked Surgeonfish, is a tang from the Indo-Pacific and Hawaii. It commonly makes its way into the aquarium trade. It grows to 21 cm in length. Recently, a huge bacterium discovered in its intestine, Epulopiscium fishelsoni, has been found to grow as large as 600 by 80 μm, a little smaller than a printed hyphen, which controls the pH of its host's gut, thereby influencing its host's ability to digest food and absorb nutrients.