After exploring the blue hole in the Bahamas for awhile, we started looking around the open ocean floor near the mouth. There were several nurse sharks lying on the ground in piles. For this shot, I got on my stomach on the sea floor and approached the shark very slowly, so as to not spook it. The shark let me take several photos from all different angles. Nurse sharks are generally very benign sharks, but should not be provoked (as with all creatures).