Rogo-Tumu-Here was an octopus-demon from Tuamotu mythology. He attacked and swallowed Hina-Arau-Riki, the wife of Turi-A-Faumea, son of Tangaroa and Faumea, and was slayed by the former males along with Tu-Nui-Ka-Rere.
References
Rogo-Tumu-Here Wikipedia(Text) CC BY-SA