The wrasse Coris nigrotaenia is described from four specimens collected in the Arabian Sea, Northwest Indian Ocean, off central/southern Oman and a single specimen purchased at the national fish market in Muttrah, Oman. It is a larger species (largest specimen, 314 mm SL) distinct in having a central vertically elongate black band which begins at the base of the dorsal fin (below the sixth, seventh and eight dorsal spines) and extends to the mid-portion of the pectoral fin, and 51-52 lateral-line scales. Juvenile and intermediate fish have a black caudal spot located dorsally at the base of the caudal fin. Adults lose this spot but have numerous blue spots, some formed into lines, on the body and dorsal, caudal and anal fins.
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