Nowadays, due to global warming, 50% of coral reefs in the world are disappearing and the sea levels are rising, so as response to this serious problem, I designed a community at sea that could help the reefs ecosystems to regenerate and so potentially revert the present situation of global warming. My research leaded me to the Bajau people, who are considered the last sea nomads. They have a deep connection with the ocean and live exclusively on the sea and rarely go ashore. I checked references from many architects concerned on similar issues as Bjarke's Oceanix City and Kunlé Adeyemi’s floating school, then I choose a site on the coast of Semporna, in Indonesia, where most of the Bajau people live and corals can be found. The system is divided into 3 levels: 1- the pillars that will support the upper construction and will enhance the growth of the new reefs underwater; 2-the platforms which are inspired by the growing patterns of coral branches; 3-the 3D printed constructions for the future community of researchers (tentatively). The pillars and the buildings will be 3D printed using the nearby sand and the space between layers of the construction will absorb and retain rainwater for consumption and vegetable farming. Thinking on Co-living conditions, I located public spaces in the main branches of the platforms. I also propose to grow oyster reefs underwater, which can bring economic benefits to the community while purifying water and reducing coastal erosions. I tried to balance economic sustainability and recovery of the natural ecosystems. I firmly believe that architecture in the future should not only benefit humans but the whole ecosystem where we live.