Dive Masters

Dive Masters (also known as Diver Down, Deep In Thought, Octopus' Garden, and The Ocean) is a recurring challenge that originated in and has since reappeared in, , , and.

Rules
Each tribe must retrieve items attached to an underwater rope, with each progressive item being deeper than the one before it. The first tribe to retrieve all their items and finish a final task wins the challenge.

History
The challenge debuted as the first challenge after the tribe switch in. The contestants had to pull themselves along a vertical underwater rope, retrieving markers along the way. After ten minutes, the tribe with the most markers won Pringles, beer, and a trip to the waterfalls of Vanuatu. Although the challenge was closely fought by both tribes, Lopevi ultimately collected the most markers, winning the challenge and reward.

In, four members of each tribe had to dive down to a 9.1 m long steel cage that contained coconuts painted in tribe colors and with letters on them. Once all the coconuts had been retrieved and put in a floating bin, the bin had to be pulled back to shore. The four remaining castaways would unscramble a word puzzle using the letters on the coconuts. Malakal defeated Airai after Malakal's strongest swimmer, Ozzy, took his time to move all the coconuts to the end of the steel cage for easier retrieval to win a reward of chickens.

The challenge reappeared in, as an Immunity Challenge. One by one, the castaways, had to dive down and retrieve eight wheel-shaped puzzle pieces clipped to an underwater rope. Once all were collected, they used the puzzle pieces to identify a mystery eight-letter word ("treasure"). Kalabaw solved the puzzle first, and was soon followed by Tandang, sending Matsing to Tribal Council for the third straight time.

In, the challenge was once again used as an Immunity Challenge. One member from each tribe would dive to retrieve a buoy in the water. Once all five buoys had been brought back to the platform, one tribe member had to shoot the buoys into a basket out in the ocean. Solana easily cruised to victory, with the challenge coming down between Luzon and Aparri. Though Aparri was trying to throw the challenge, several members of Luzon, most notably J'Tia, struggled. This allowed Aparri target Cliff to unknowingly save himself, sending Luzon to Tribal Council again.

In, the contestants first had to swim out one by one to a netted ramp, jump off to grab one of five keys, and use them to unlock a crate containing diving goggles. Using those, contestants must take turns diving into the water to untie and retrieve five rings. After the rings are collected, they must be tossed around five poles to win immunity. The Takali tribe initially fell behind after David's poor performance retrieving his key. However, they were able to catch up on the ring tossing segment to win against the Vanua tribe.

Trivia

 * Ami Cusack, Eliza Orlins, and Jonathan Penner have all competed in this challenge twice.
 * Jonathan won both times, while Eliza and Ami have only won once.
 * The eventual runner-up has always been on the winning tribe.
 * In seasons featuring a red tribe, the red tribe won. In seasons featuring a purple tribe, the purple tribe won.