In the Mediterranean Sea, highly frequented yachting and scuba diving sites generate anchoring areas that affect valuable Posidonia seagrass. These are valuable ecosystems with a high biodiversity and which sequester CO2 . However, even the mooring buoys supposed to fix this problem are made of fossil-fuel based materials and require regular maintenance to withstand UVs and fouling. The #FRF project aims to develop a more ecological and sustainable, biomimetic mooring buoy. Made of 3D printed biogenic material, this buoy’s design inspired from sea sponges, will be used as a refuge by various local species. No maintenance would be required and each buoy could last for decades. Ultimately, several of these semi-floating reef-buoys would be deployed in the same area to create an educational submarine trail to raise awareness of biodiversity preservation among the general public. This concept could easily be replicated anywhere in the world. A scientific monitoring protocol is also planned to assess the effectiveness of the buoys in the long term.