This year, the world witnessed the most devastating mass coral bleaching event ever recorded which left behind dead reefs in at least 38 countries. (350.org)
It's an emergency surgical intervention meant to undo damage caused by human activity both in the oceans and on dry land, and it has been shown to work — bringing dead reef sections back from the edge in just a few years. (businessinsider.com)
These hardy corals — known as coralliths — grow on pebbles or fragments of dead reefs, and they can survive being buffeted by waves and ocean currents. (sciencedaily.com)