Ken Nedimyer is helping to restore dying coral reefs in the Florida Keys . He and his group are growing coral in nurseries before transplanting them to the wild . Hide Caption 1 of 6 Photos:Coral reef restoration efforts around world Coral reefs are critical to marine life , many economies . Do you know a hero ? `` Most people think coral takes forever to grow , but some of these corals grow really fast , '' he said . Nominations are open for 2012 CNN Heroes .
Ken Nedimyer is helping to restore dying coral reefs in the Florida Keys . He and his group are growing coral in nurseries before transplanting them to the wild . Hide Caption 1 of 6 Photos:Coral reef restoration efforts around world Coral reefs are critical to marine life , many economies . Do you know a hero ? Nominations are open for 2012 CNN Heroes .