约翰兰德蝴蝶鱼 Johnrandallia nigrirostris（Gill,1862）yuē hàn lán dé hú dié yú

约翰兰德蝴蝶鱼，Johnrandallia nigrirostris（Gill,1862），蝴蝶鱼科约翰兰德蝴蝶鱼属的一种鱼类。栖息于珊瑚礁区和岩礁区水深6－40米之间的水域。通常组大群生活。主要以海藻、腹足类动物以及小型甲壳类动物为食，也会啄食大型鱼只，例如东太平洋副花鮨（Paranthias colonus）等的体表寄生虫。

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Johndrandallia nigrerostris (gill, 1862), a fish of the genus johndrandallia in the family Phalaenopsis. It inhabits the waters between 6-40 meters deep in coral reef area and rock reef area. Usually live in large groups. From fishbkw.com It mainly feeds on algae, gastropods and small crustaceans. It also pecks large fish, such as the body surface parasites of paranthias Colonus in the East Pacific.