Scientists invent underwater umbrellas to protect coral reefs

Couldn't you have a floating hole filled net to give shade over larger areas? I guess this is the early stages of testing the idea, but if it's promising enough, I think floating surfaces are the way to go.

Probably not a reef-scale solution, but as triage for nurseries and high-value colonies during heatwaves, this seems genuinely useful

Unfortunately stony corals also face a grave threat from ocean acidification due to rising CO2 in the atmosphere. They need alkalinity to make their skeletons.

Nothing that could potentially scale without unintended consequences. Next

It’s all the ships from China spewing carbon into the ocean

Yea

So how do you install 250k km2 of underwater umbrellas, and who stands to get filthy rich from this?

Stopping direct sunlight exposure to help stop coral bleaching is an awesome idea.

Have to nitpick though, umbrellas protect you from falling water, parasols block light.