Sumo at Sea (challenge)

Survivor Sumo (officially known as Sumo at Sea, Kung Fu Cannibals and Sumo in Mud) is a recurring challenge that originated in and was used in later seasons.

Rules
One member from both tribes face off in an arena surrounded by either water (, and ) or mud ( and ). Using their sandbags, or any other body part other than their hands, they must try to knock each other out of the arena.

History
In, its debut season, Koror narrowly managed to beat out Ulong for immunity.

The challenge reappeared as a reward challenge in. Moto won, taking home fishing gear, toiletries, coffee and potatoes.

The Heroes won this challenge in. In addition to Immunity, the tribe also won rice, sugar, coffee and the tribe's luxury items.

The challenge appeared once again in. Although Tadhana started off strong, Galang managed to make a comeback and ended up winning their third Immunity Challenge.

The challenge will appear again in.

Trivia

 * Tom Westman and Tyson Apostol are the only people to participate in this challenge twice.
 * However, Tom is the only person to win this challenge twice since Tyson only won it in his second attempt.
 * Both competed in a variation with water and mud.
 * The occurance of this challenge in marks the first time a challenge has ever taken place in the ocean in seasons filmed in Nicaragua.