Frag-n-Fly gardening method for coral restoration - Pitching to the industry level the methods for coral fragmentation and outplanting in coral reef restoration

This study introduces the Frag-n-Fly method, an innovative approach to large-scale coral gardening designed to improve the efficiency of fragmentation and outplanting while meeting maritime industry standards. The method follows a six-step workflow implemented during two maritime expeditions and centers on a cache area adjacent to the restoration site, where scientifically validated artificial reef structures replace traditional land-based husbandry facilities. By eliminating terrestrial transport and aquaria-based acclimation, Frag-n-Fly reduces coral stress and provides a stable in situ environment for acclimation and fragmentation. Validation was achieved by processing 2000 colonies, producing over 20,000 fragments. The method demonstrated a fivefold increase in fragmentation throughput (∼50 vs. 10 colonies per hour), a ∼30-50% reduction in project costs, and early survivorship rates comparable or superior to traditional husbandry (0.11% vs. 0.69% mortality at 75 days). While Frag-n-Fly provides substantial gains in scalability and efficiency, it requires validated artificial reef technologies, specialized vessels, and trained personnel. The method is therefore best suited for industrial-scale, offshore restoration projects, while complementing traditional nursery-based approaches. Methodological advances:•Coral gardening conducted entirely at sea, eliminating land-based logistics.•Permanent cache areas with validated artificial reef modules ensure coral acclimation and survival.•Industrial tools enable high-throughput fragmentation and large-scale cost-efficient outplanting.