Xyrichtys sanctaehelenae, the yellow razorfish, is a species of marine ray-finned fish from the family Labridae, the wrasses. It is found in the central Atlantic Ocean.Gomon, M.F. and P. Forsyth, 1990. Labridae. p. 868-882. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon, SEI, Paris; and UNESCO, Paris. Vol. 2.
Description This species reaches a length of .
Etymology The fish is named in honor of the island of St. Helens in the Atlantic.
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