unicorn fish
noun
1- any of a number of fishes with a horn-like projection on the head长吻鼻鱼, 单角鼻鱼。
1.1
- an Indo-Pacific surgeonfish (genus Naso, family Acanthuridae)印度洋-太平洋刺尾鱼（鼻鱼属, 刺尾鱼科）。
1.2
- a crestfish with a dorsal fin that extends forward from the head (Lophotes fiskii, family Lophotidae)冠带鱼, 背鳍从头部前伸（淡竹叶属, 冠带鱼科）。