To track the impacts of environmental change and enable conservation efforts, we must first understand the composition of our ecosystems. A new online resource provides a comprehensive overview of hard coral distribution across the Ryukyu Islands, based on extensive environmental DNA (eDNA) analysis. To track the impacts of environmental change and enable conservation efforts, we must first understand the composition of our ecosystems. A new online resource provides a comprehensive overview of hard coral distribution across the Ryukyu Islands, ba... [3053 chars]