黑背鼻鱼 Naso lituratus hēi bèi bí yú

黑背鼻鱼，Naso lituratus又称天狗倒吊，颊纹双板盾尾鱼，颊吻鼻鱼，属鲈形目、刺尾鱼科、鼻鱼属，为一类生活在泛珊瑚礁区的热带海水鱼，它们的游泳能力强，活动空间大，并不是纯粹的珊瑚礁鱼类。黑背鼻鱼分布于西太平洋南海至菲律宾及红海海域，在珊瑚礁区及其外围地区都可以见到，它们在海洋中觅食小型猎物，也会去珊瑚礁上啃食海藻等有机物，为一种著名的观赏鱼。

百度翻译提供：

Black backed snout fish, naso lituratus, also known as Tiangou hanging upside down, buccal double plate shield tail fish and buccal snout fish, belong to Perciformes, spiny tail family and snout fish. They are a kind of tropical marine fish living in the pan coral reef area. They have strong swimming ability and large activity space. They are not pure coral reef fish. Black backed snout fish are distributed from the South China Sea of the Western Pacific to the Philippines and the Red Sea. They can be seen in the coral reef area and its surrounding areas. They feed on small prey in the ocean and also eat organic substances such as algae on the coral reef. They are a famous ornamental fish.