Iniistius twistii, the redblotch razorfish, is a species of marine ray-finned fish from the family Labridae, the wrasses. It is found in the western Pacific Ocean.Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984. The fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p. (text).

Description This species reaches a length of .

Etymology The fish is named in honor of Albertus Jacobus Duymaer van Twist (1809–1887), the Governor-General of the Dutch East Indies who governed for five years from 1851 to 1856.

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