Underwater gardener?

Say whaat? That's what I thought. But recently a lot of underwater gardeners have been hyred to plant corals.  The Great Barrier Reef off the northeast coast is being threatened big time lately. I bet you all have heard about the great barrier reef. If you havn't, google it :) Well, anyway, as I said: The great barrier reef is threatened by huge ships crashing into the reef and spreading oil all over the place. It's a big problem, because if the coral reef die, we will die. Because the coral reefs produce ocsygen. Ergo without it, we can't breath.That would be a shame.. AND sadest of all is that it is sooooo beautiful! I have been there my self and it would be so sad if not everyone could experience the same.. BUT thank God for the underwater gardeners! :) Saving the world and the beautiful coral reefs at the same time!