Environmental advocate Join Cousteau hosting a Going Green : Oceans special . GMT joins team from Catlin Seaview Survey as they map Australia 's GMT . Watch Friday March 29 at 15:30 GMT ( 11:30 ET ) 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 . Philippe Cousteau for Twitter chat immediately after show # CousteauCNN .
Environmental advocate Join Cousteau hosting a Going Green : Oceans special . GMT joins team from Catlin Seaview Survey as they map Australia 's GMT . Watch Friday March 29 at 15:30 GMT ( 11:30 ET ) Philippe Cousteau for Twitter chat immediately after show # CousteauCNN .