六棘鼻鱼（学名：Naso hexacanthus），又名剥皮仔、打铁婆，为刺尾鲷科鼻鱼属下的一个种。

Naso hexacanthus is a tropical fish found in coral reefs in the Pacific and Indian Oceans. It is commonly known as the sleek unicornfish, sleek unicorn, blacktongue unicorn, blacktounge unicornfish, Thorpe's unicornfish, or the Nohorn unicorn. It is of value in commercial fisheries and as a gamefish, and is also seen in aquaria.