(J. R. Forster, 1801)
Naso lituratus is a species of fish in the family Acanthuridae, the tangs and unicornfishes. Its common names include barcheek unicornfish, clown tang, masked unicornfish, naso tang, orange-spine surgeonfish, orange-spine unicornfish, Pacific orange-spine unicorn, poll unicornfish, redlip surgeonfish, smooth-head unicornfish, and striped unicornfish.
This species can be found in the Indian Ocean and the Pacific Ocean. This species can be easily recognised by two bright orange forward-hooked spines on the caudal peduncle (the tail base), its orange lips and black face mask. The body is brownish-grey with yellow nape and there is a broad black band on the dorsal fin. It reaches about 45 cm in length.
It can be found on coral reefs, often in pairs.
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