The Naso Tang (Naso lituratus) is also known as the Lipstick Tang or Orangespine Tang. It has red or orange lips and a yellow-edged black mask that covers the snout and eyes. The body is grey-brown and often lighter on the dorsal side and the dorsal fin is black. The anal fin is orange with blue and black trim and the base of the tail is orange, and the tail itself has a yellow vertical edge. Adult males develop long "streamers" from the top and bottom edge of the tail.
The very similar Blonde Naso Tang (N. elegans) is identical but with an orange-yellow dorsal fin and was once thought to be a regional variant; it is now considered a seperate species. N. lituratus is found in the Pacific Ocean while N. elegans is from the Indian Ocean.