Sydney Shark

Sydney Shark is a recurring challenge that originated in.

Rules
Contestants must control a shark in a fast-paced game where the objective is to cause as much damage and deaths as possible, earning points from every action.

History
The challenge debuted in where it was held as the inaugural immunity challenge. Despite having an advantage, Rapa Nui was beaten by Tuamotu.

The challenge reappeared in as the the fourth Redemption Island duel. Domca defeated Dylan, and in addition to staying in the game, Domca was able to give a clue to the Hidden Immunity Idol to anyone still in the game. She chose Nick.

The challenge returned for a third time in, once again as the first immunity challenge; however, as a twist, five of the twenty-five contestants would win Individual Immunity with it. The winners would not be revealed beforehand, and the immunity necklaces would function like Hidden Immunity Idols at the first Tribal Council, which all contestants participated in.

Other Appearances
Sydney Shark appeared during where it was played alongside Miami Shark as a reward/immunity challenge. The person with the highest multiplied score would win immunity, while the person with the second highest multiplied score would win reward in the form of a clue to the Hidden Immunity Idol; Taylor won immunity while Lloyd claimed reward.

Trivia

 * Eden, Mitchell, and Ted are the only contestants to participate in this challenge twice.
 * They participated both times it was the first immunity challenge of the season.
 * Ted has won twice, while Eden and Mitchell have both lost twice.