Coral reefs around the world are vanishing at an unprecedented rate. We’ve lost 50% of the world’s coral in the last 30 years. Scientists say that climate change is now their greatest threat and it is estimated that only 10% can survive past 2050. In a new documentary film, “Chasing Coral,” a team of divers, photographers and scientists set out on a thrilling ocean adventure to discover why coral are vanishing and to reveal the underwater mystery to the world.