Oba is the Yoruba Orisha of the River Oba in Nigeria, and represents marriage and domesticity. An Orisha is a spirit that reflects one of the manifestations of God (Eledumare, Olorun, Olofi) in Yoruba religion. There are a total of 401 orishas.
The Girl-Fish - “The whole troop floated into the chamber of audience, where the queen, who was half a woman after all, was seated on a throne made of a green and blue shell." The Orange Fairy Book by Andrew Lang Illustrated by Tomislav Tomic