A huge coral reef system has been discovered about 160 miles off the South Carolina coast, located at a depth of half a mile. Scientists estimate that this reef could extend for up to 85 linear miles and may have been growing for thousands of years. This finding challenges previous beliefs about where corals can thrive on the East Coast. Researchers emphasize the importance of these reefs for recycling nutrients, which supports marine life and fisheries. This discovery will lead to updated models and further exploration in the region.