Moturakau is one of 15 islands in the Aitutaki atoll of the Cook Islands. It is located in the southeast of Aitutaki Lagoon between the larger islands of Rapota and Tekopua, six kilometres to the southeast of the main island of Aitutaki. The island is 460m long and 120m wide.
Moturakau served as a leper colony from the 1930s to 1967. More recently, it was home to the 'Sharks' for four years of the UK reality TV programme ' and was also used for ', the 13th season of the American version of Survivor.