Seagrass meadows are endangered ecosystems which are vital to marine biodiversity and blue carbon storage. Restoring these ecosystems is essential to combatting climate collapse. Unfortunately, current restoration methods are too expensive and inefficient for large-scale projects. Robocean is mechanising seagrass restoration through innovative autonomous and remotely operated subsea robotics which collect and plant seeds. Our technology removes barriers to restoration by lowering workforce costs and accelerating the entire process. Our cohesive network of amphibious robots will support restoration processes from seed to sapling. With international technological applications, Robocean will rewild our oceans and turn the tide on climate change.