The Tucuxi (Sotalia fluviatilis), alternately bufeo gris or bufeo negro (both in Peru)'s a dolphin found in the rivers of the Amazon Basin. The word "tucuxi" (pronounced too-koo-shi)'s derived from the Tupi language word tuchuchi-ana and has now been adopted as the species' common name. Despite being found in geographic locations similar to those of 'true' river dolphins such as the Boto, the Tucuxi isn't closely related to them genetically. Instead it's classed in the oceanic dolphin family (D… (More on Tucuxi)