Tribe Switch

A Tribe Switch (also known as Tribe Shuffle or Tribe Swap) is the very first game-changing twists of Survivor. This twist sends members from one tribe to the rival tribe and vice versa.

About
The Tribe Switch is a twist can happen in a random point during a game and this reassignment of tribes will be effective until the tribes merge or a new opportunity to switch tribes shows up (e.g. a second switch.)

Normally it would send half of the tribe to the other when both tribes have equal number of tribe members, though it has changed depending on circumstances.

A variant of the tribe switch, the Tribe Dissolve, is where one or more tribes cease to exist after the switch. It either requires the entire tribe to be dismantled and its remaining members are spread into the remaining tribes (absorption) or requires that all remaining players, usually in four or three tribes, in the game are shuffled between two of four tribes.

Very rarely, a third tribe will be created when a tribe switch occurs. These tribes are called Post-Swap Tribes.

The first time a tribe switch occurred was in, where the tribes were switched at sixteen people left. This divided the remaining castaways into two tribes of eight.