"Here's the estimated price for restoring two declining coral species found in South Florida and the Caribbean: about $250 million.

How long will it take? 400 years or so (assuming all goes smoothly).

No one expected it would be easy to restore elkhorn and staghorn corals, the once-abundant, reef-building species that since the 1970s have vanished from almost all of their old range. A recovery plan released this month by the National Marine Fisheries Service says the biggest current threat is climate change, a problem beyond its power to solve."

David Fleshler reports for the Los Angeles Times March 22, 2015. [2]