In this episode of The Global Reef Expedition, the scientific team aboard the “Golden Shadow” visits the Chagos Archipelago, a tropical paradise with some of the healthiest coral reefs on the planet. They come to study reefs seemingly untouched by man, but instead become witnesses to a bleaching incident that transforms the reefs right before their eyes. But before they leave, they also discover rays of hope in little sprigs of coral that fight on.