The document describes the origin and tribes of the Underwater world. There was initially war between fish species until Sirena initiated peace and divided the fishes into five tribes, each with their own ruler. The tribes are Sirena, Jolly Jelly, Chrono, Forsaken, and Mojo Berg. Each tribe has its own unique attributes and themes, such as Sirena being the royal tribe and Jolly Jelly enjoying candy making.