Beneath the turquoise waters of the Aegean Sea lies a world that few people have ever seen. Hidden between 30 and 200 metres below the surface, where sunlight begins to fade and conventional scuba diving reaches its limits, vast underwater ecosystems quietly support an extraordinary diversity of marine life. These fragile habitats, known as marine animal forests, have become the focus of Under The Pole’s DEEPLIFE scientific programme, an international initiative dedicated to improving understanding and protection of one of the Ocean’s least explored environments.
As part of this ambitious programme, Under The Pole travelled to the Greek archipelago of Fourni, where scientists, technical divers and conservation partners undertook a mission to study the Mediterranean’s mesophotic ecosystems. Recognised as an official project of the United Nations Decade of Ocean Science for Sustainable Development (2021–2030), DEEPLIFE brings together the French National Centre for Scientific Research (CNRS) and an international scientific consortium to investigate ecosystems that remain largely unknown despite their importance to marine biodiversity.
The significance of the Fourni expedition extended well beyond scientific discovery. Under The Pole worked alongside the Archipelagos Institute of Marine Conservation, local authorities, community members and supporters to translate scientific knowledge into meaningful conservation outcomes. By combining field research with advocacy and public engagement, the expedition demonstrated how exploration can directly contribute to protecting vulnerable marine ecosystems.
One of the expedition’s most significant achievements was helping support the protection of 450 square kilometres of coralligenous habitats within the Fourni archipelago. According to Under The Pole, this conservation milestone resulted from collaboration between the organisation, the Archipelagos Institute, environmental advocate Camille Étienne and the local community of Fourni. It stands as one of the flagship accomplishments of the DEEPLIFE programme and demonstrates how scientific exploration can inform practical conservation measures.
The Fourni mission also highlights Under The Pole’s broader philosophy of making the invisible visible. Founded by Emmanuelle Périé-Bardout and Ghislain Bardout, the organisation has spent years developing innovative approaches to underwater exploration that bridge scientific research, technological innovation and public awareness. Through DEEPLIFE, these expeditions seek not only to advance scientific knowledge but also to strengthen the connection between research, policymakers and society at a time when marine ecosystems face increasing pressure from climate change and human activity.
Operating from its expedition vessel WHY, Under The Pole has established itself as a pioneer in exploring environments that remain beyond the reach of most scientific programmes. Each expedition contributes valuable information to an international network of researchers studying mesophotic ecosystems across the globe, while reinforcing the importance of international collaboration in addressing the challenges facing the Ocean.
The Fourni expedition serves as a powerful reminder that some of the Mediterranean’s most important ecosystems remain hidden beneath the surface. Through pioneering deep-diving techniques, international scientific collaboration and a commitment to turning research into conservation action, Under The Pole has revealed not only the extraordinary biodiversity of Greece’s underwater forests but also the importance of protecting them for future generations. As DEEPLIFE continues its decade-long mission, the discoveries made beneath the waters of Fourni stand as an enduring example of how exploration, science and local partnerships can work together to safeguard one of the Ocean’s most remarkable and least understood environments.
