It's a battle of the sexes as the tribes are separated into men versus women. The 18 castaways will be divided into Tribes of nine: the Salani Tribe and the Manono Tribe, named after islands in Samoa.

Nina Acosta

Nina Acosta

Age: 51

Current Residence: Clovis, Calif.

Occupation: Retired LAPD Officer

Meet the Castaways