Hina-Oio is a goddess of the sea animals in the mythology of Easter Island.
The creation chant of the Rapa Nui people of Easter Island refers to Hina-Oio twice in the following passage:[2] Huru-au ki ai ki roto Hina-oio, ka pu te moa.
Feather by mating with Hina-oio produced the fowl Tail by mating with Hina-oio produced the crayfish This passage was sung from memory by an old man named Ure-vai-ko to William Thomson, an American on an 1886 Smithsonian expedition to Easter Island.
The chant was written in Rongorongo on tablets, which Ure-vai-ko refused to read for religious reasons.
However, under the influence of alcohol, he agreed to recite the stories and chants on the tablets from photographs of them which had been made by Thomson's expedition.