Coral reef restoration strategies use natural and anthropogenic processes to restore damaged coral reefs. Reefs suffer damage from a number of natural and man-made causes, and efforts are being made to rectify the damage and restore the reefs. Scientists say it takes 15 to 25 years for a reef to recover from serious bleaching and become healthy enough to support a rich host of marine life. But today, with the relentless and extreme warming our oceans now face, corals are running out of possible recovery time.