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  2. Underwater footage gives us a look at the mysterious bottom of a Canadian cottage lake

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  6. Researchers find bizarre creatures active under ice

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  7. Free divers explore Tonga's mysterious and beautiful Swallow's Cave

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  9. These Marine Iguanas of the Galapagos are just like mini dinosaurs

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  10. Scuba divers meet the most affectionate fish in the Galapagos Islands

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  11. Marine iguanas of the Galápagos Islands are a wonder of evolvution

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  12. Check Out The Magical And Mysterious World Beneath The Waves In The Cayman Islands

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  13. Scuba divers tucked into crevices encounter incredible wildlife

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  14. Diving dog incredibly fetches brick from ocean floor

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  15. This Swimming Hole In Texas Is A Real Challenge For Thrill-Seekers

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  16. Scuba divers explore eerie & beautiful shipwrecks in the Great Lakes

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  17. Lucky scuba divers encounter the largest species of shark in the world

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  18. Scuba divers meet one of the world's most bizarre gigantic fish

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