Indo-Pacific: Cocos-Keeling to the Hawaiian, Marquesan and Tuamoto islands, north to southern Japan, south to Rowley Shoals in the eastern Indian Ocean and Lord Howe and Rapa islands. Replaced by Gomphosus caeruleus in the Indian Ocean (Ref. 37816). Hybrid with Thalassoma lunare documented from Cassini Island, Western Australia and reported from the Great Barrier Reef; with Thalassoma duperrey, observed from Hawaii (Ref. 57557).