MOSES is a modular artificial reef technology developed by ReefSystems to enhance marine biodiversity and ecological performance in coastal and offshore environments. The system consists of interlocking concrete units, known as MOSES blocks, mounted on reef plates that can be adapted to different seabed conditions and project goals. Each block is designed for ecological functionality, with varied textures, cavities, and surface roughness that stimulate the settlement of oysters, mussels, seaweeds, and other marine organisms.  

The structures are produced from recycled concrete aggregates under the Urban Mine principle, resulting in roughly 67% lower CO₂ emissions than conventional materials. The geometry and porosity of the blocks promote marine growth while ensuring long-term stability under tidal and wave forces. Situated at the foot of the Lauwersmeerdijk and the Wadden Sea, the reef enhances biodiversity and ecosystem connectivity by providing complex habitats for shellfish, seaweeds, crustaceans, and fish.  

Monitoring included annual reef retrievals for direct study. Techniques such as scrape sampling, 3D scanning, and collection of sessile organisms document colonization and species diversity, while fish traps record the presence of mobile fauna. 

• Clear communication and involvement of contractors in every step of the proces. This could smoothen a lot of processes and make installation more uniform.  
• Optimize orientation and spacing to enhance water flow, sediment exchange, and species settlement. 
• Document design, results, and lessons learned to support scalable, nature-inclusive reef development. 
• The MOSES reefs are universally applicable. This project is being used as a flagship example project for other dike reinforcements and coastal infrastructure project in the Netherlands.