Records of Thalassoma bifasciatum from northeastern Brazil are actually Thalassoma noronhanum. Known from the Brazilian coast, from Maranhão to São Paulo (Ref. 40101, 49354), including Manuel Luiz Reefs, Atol das Rocas, Fernando de Noronha, St. Paul’s Rocks, Zumbi Reefs, and Trindade Island (Ref. 57756). At Fernando de Noronha and Trindade Island, groups of 10-450 initial-phase individuals clean other fishes in the water column close to the reef bottom and pinnacles (Ref. 36301, 49354). Fish clients include about 20 species of surgeonfishes, damselfishes, parrotfishes, grunts, and even small groupers such as coneys. Occasionally, a coney (Cephalopholis fulva) preys on isolated Noronha wrasses out and away from the cleaning stations. Coastal individuals were never recorded cleaning. Strictly diurnal, this wrasse is one of the last reef fishes to emerge from nocturnal shelters and one of the first to retreat (Ref. 36301). Also Ref. 13121, 33499.