- 460 viewsDuration: 11:16For decades, the story of the world’s oceans has been dominated by warnings over coral reef bleaching and the threat climate change poses to one of the planet’s most vital ecosystems. But Africa’s first Ocean Conference has offered a rare sign of hope. With more than a third of the world’s coral reefs showing remarkable resilience, scientists and conservationists are now calling for expanded marine protected areas to safeguard these underwater ecosystems. Laura Otieno takes a closer look at these resilient reefs and why they could hold the key to the future of our oceans on this week’s Citizen Planet.