Autonomous Robots Could Revolutionize Coral Reef Restoration

Coral reefs are collapsing globally, with 84% bleached between January 2023 and September 2025 and the Great Barrier Reef losing nearly a quarter of its coral cover from 2024 to 2025. Manual restoration by divers is too slow; even large projects like the Mars Coral Reef Restoration effort (since 2006, ~27 acres at ~440 yards/day) cannot keep pace. Researchers are developing robotic solutions: Benjamin Moshirian's Deployment Guidance System (DGS) is an automated underwater planter that drops a coral seedling on a ceramic plate in half a second, costing about $1 per seedling versus $8 for current methods. A budget "DGS Lite" using GoPros is also in development. Ian Enochs at NOAA's lab in Florida uses robots to stress-harden corals by heating water to identify heat-tolerant genotypes for replanting. Melanie Olsen of the Australian Institute of Marine Science envisions fleets of drones, submersibles, and surface vessels working together. However, community-based projects like Lavinia Fiori's on Isla Grande, Colombia, which lost all restored corals in a 2023 bleaching event, lack access to such technology. Experts caution that robots alone cannot solve underlying issues like warming oceans and pollution, emphasizing the need for political will and community participation.