New Scientist: How are you keeping tabs on coral? The Catlin Seaview Survey (CSS) has captured 800,000 images of coral reefs from 22 countries in four years. It's the largest stocktake of the health of reefs worldwide in history. Right now we have an expedition in the Maldives. We really want to get good baseline data as we start to see the next coral bleaching event. Why should we focus on coral reefs? These reefs create a microcosm story: they are a metaphor for where the world is going, and one of the strongest...