白颊刺尾鱼 Acanthurus leucopareius bái jiá cì wěi yú

白颊刺尾鱼，又称白斑刺尾鲷，俗名粉蓝倒吊 为辐鳍鱼纲鲈形目刺尾鱼亚目刺尾鱼科的其中一个种。分布于太平洋海域，常成群在有浪的地方或较空旷的浅水处出现。属于藻食性，以吃丝状藻为主。

百度翻译提供：

White buccal barbed tail fish, also known as white spotted barbed tail snapper, commonly known as pink blue upside down, is one of the species of barbed tail family of Perciformes barbed tail suborder of radiofin fish. It is distributed in the Pacific Ocean and often appears in groups in places with waves or open shallow water. It belongs to algal feeding habit and mainly eats filamentous algae.