I don't usually post this kind of stuff but I thought it was interesting, worthy and very visual.
http://www.grindtv.com/outdoor/blog/50917/shark-eating+seal+among+rare+and+stunning+scenes+documented+off+south+africa/
http://www.grindtv.com/outdoor/blog/50917/shark-eating+seal+among+rare+and+stunning+scenes+documented+off+south+africa/