https://www.cnet.com/news/killer-drones-will-now-deliver-coral-babies-in-the-great-barrier-reef/

A collaboration between researchers at Queensland University of Technology (QUT) and Southern Cross University (SCU), the LarvalBot is able to deliver baby coral through the Great Barrier Reef like an "underwater crop duster.

"It's like spreading fertiliser on your lawn," says Matthew Dunbabin, professor at QUT and developer of the drone technology. "As [the drone] glides along we target where the larvae need to be distributed so new colonies can form and new coral communities can develop."