https://motherboard.vice.com/en_us/article/yw7mpk/this-underwater-robot-larvalbot-will-squirt-coral-larvae-onto-the-great-barrier-reef-to-save-it

Millions of tiny corals on the Great Barrier Reef have a new mommy—an underwater robot christened the “LarvalBot.”

The black-and-yellow submersibles, which are roughly the length of a skateboard, are part of an ambitious project to conserve the Great Barrier Reef by seeding it with coral larvae, which can grow and help to regenerate damaged areas. The iconic ecosystem has suffered numerous coral bleaching events over the last two decades, overwhelmingly attributed to climate change.