In this fascinating documentary, National Geographic explorer Enric Sala and his team of scientists set out to explore one of the world's most pristine coral reefs. In a tiny archipelago tucked in the South Pacific, the reef, which Sala has dubbed "Shark Eden," contains three times more coral and 10 times more sharks than any other reef in the world. Watch as the team explores this flourishing shark haven and its healthy ecosystem, picking up vital clues to saving our planet's coral reefs. 50 min. Widescreen; Soundtrack: English Dolby Digital 5.1; Subtitles: English; bonus short.