The snubfin dolphins (Orcaella) are a genus of Cetaceans containing two members: the Irrawaddy dolphin (Orcaella brevirostris) and the Australian Snubfin dolphin (Orcaella heinsohni). The genus was long believed to be monotypic with the only species being the Irrawaddy dolphin; however, in 2005, supposed Irrawaddy dolphin populations inhabiting the Australian/New Guinean regions were found to be significantly different and were declared a separate new species named the Australian Snubfin dolphin.