Scientists on a National Oceanic and Atmospheric Research ship have found lots of dead and dying coral about seven miles southwest of the Gulf of Mexico oil spill. The coral is covered in a black substance and, perhaps tellingly, is situated down current at about the same depth as the wellhead. It seems likely the oil spill and the dying coral are related, though lab tests will be needed to confirm this. Read this article in the National Geographic for more.
For an interesting perspective, check out how surfers and sport anglers reacted to the BP oil spill.