Survivor: Cook Islands is the thirteenth season of the American CBS competitive reality television series Survivor. During this season of Survivor, the 20 contestants were divided into four tribes by ethnicity (African American, Asian American, Hispanic American, and European American). These four tribes were named some of the islands located in the Cook Islands: Manihiki, Puka Puka, Aitutaki, and Rarotonga. The four tribes evenly divided into two new mixed tribes after the second tribal council, taking the Aitutaki and Rarotonga names. A mutiny offer was made to all remaining players during before the merge; two of the players on the same tribe accepted. After the nine remaining contestants merged, they decided to name themselves Aitutonga. This season also featured the first time a tribe has voted off two members during a single tribal council. The concept of Exile Island returned, with a hidden immunity idol located somewhere on the island. Instead of the usual final two players facing a jury of seven, there was a final three facing a jury of nine, which included players who had been voted out before the merge.