In this session led by Xavier Bougeard, mission officer for youth at the Tara Expéditions Foundation, students will learn about the scientific "Tara Pacific" expedition, focused on studying coral reefs—a biodiversity threatened by climate change and human activities. Through this immersive experience, they will gain insight into the challenges facing marine ecosystems and the crucial role these expeditions play in advancing our understanding of environmental preservation. The session will highlight the importance of protecting these vital ecosystems for the health of the planet.