The pic was taken at the infamous "Tiger Beach" in the Bahamas. Tiger Beach is a shallow site that is perfect for shark interactions - as you can see there are quite a few sharks around.
The sharks behind me are lemon sharks (Negaprion brevirostris). As you may have guessed, the main draw at this site are the beautiful tiger sharks (Galeocerdo cuvier) that frequent this site.
Tiger Beach | Bahamas | 2009 | © Colin Lee