The explosion on BP's Deepwater Horizon killed 11 people on April 20 and mushroomed into the greatest man-made natural disaster in U.S. history.
The government says that 35 stranded dolphins have been verified in the oil-spill area. Of these, 33 dolphins were stranded dead and two stranded alive. One died on the beach and another in Florida was later euthanized. So far, two of the 35 stranded dolphins have shown evidence of external oil, but it's unknown whether or not the oil caused their deaths.
Photo by NOAA