Monitoring the colonization of 3D reefs by fixed species

In 2017, the AMPN submerged six 2.5-ton reefs in the heart of the Larvotto Marine Protected Area. This was an innovative initiative, as the reefs were created using 3D printing - a technique that allows for the design of complex shapes closely mimicking natural habitats. They are made from dolomite sand and volcanic ash, eco-friendly materials that promote marine life development. The project stands out for its pioneering nature: never before had such large 3D-printed reefs been deployed.

Since their installation, the AMPN has carried out biannual monitoring of colonization by sessile species (algae, sponges, cnidarians, etc.) with the support of experts from Thalassa Marine Research & Environmental Awareness and Aquanaute Expertise.

Monitoring conducted between 2017 and 2024 revealed that the entire available surface has been colonized by numerous organisms, including rare and protected species like the spiny cystoseira, which is declining across the Mediterranean. These findings confirm that the reefs are successfully supporting biodiversity by providing an ideal substrate for the development of a rich marine community.

The first 2025 survey has just concluded, and we look forward to sharing the latest observations with you soon.

This program is supported by the Fondation Prince Albert II de Monaco. 

Photo credit : Stéphane Jamme - Aquanaute Expertise.