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The teams grab their cameras and diving gear and hit the turquoise waters of the Maldives, where rare silvertips lurk and ferocious tiger sharks circle.

Along Australia's Great Barrier Reef, the teams get the rare chance to dive at night. Between bamboo sharks and wobbegongs, the race is gill and gill.

Brutal currents and jellyfish stings make Japan the most challenging dive yet — but the prospect of seeing a sharknado keeps the group's spirits afloat.

Low visibility and an imminent elimination create choppy competition in South Africa. Still, the teams are determined: Will they find a great white?

With a game-changing bonus in play, the teams head to Bimini. Amid lemon sharks and an epic hammerhead sighting, one expert bravely faces their fears.

The finalists duke it out in the Galápagos, a shark-rich hotspot. Can they snap a photo of an ultra rare whale shark — or will a killer get in their way?