Environmental advocate Philippe Cousteau hosting a Going Coastal : Oceans special . Join CNN Special Correspondent Philippe Cousteau as he explores Australia 's Great Barrier Reef with scientists from the Catlin Seaview Survey as they map the extraordinary eco-system with pioneering photographic equipment . He joins team from the Geological Survey as they map Australia 's Great Southern Reef . Watch Friday March 15 at 15:30 GMT ( 11:30 UTC ) Join team for Twitter chat immediately after show # CousteauCNN .
Environmental advocate Philippe Cousteau hosting a Going Coastal : Oceans special . He joins team from the Geological Survey as they map Australia 's Great Southern Reef . Watch Friday March 15 at 15:30 GMT ( 11:30 UTC ) Join team for Twitter chat immediately after show # CousteauCNN .