New Technologies for Monitoring and Upscaling Marine Ecosystem Restoration in Deep-Sea Environments

•Marine deep-sea restoration should be based on landers with docked crawlers and AUVs, allowing in-situ autonomous interventions, battery recharging, and remote data transmission.•Crawlers with robotic arms should be used for active restoration.•Innovative combinations of HD, multi-beam imaging, active acoustics, omics and environmental (oceanographic and biogeochemical) sensors should be used to enable restoration monitoring.•We describe three potential case-studies for robotic-mediated restoration in deep-sea iconic environments.