Re: Do great white sharks have any predator?

Very little is known about the great white shark, but one incident of 
predation where the great white was the "eaten", instead of the "eater", 
has been observed, and even videotaped! The predator was an orca (killer 
whale). The encounter is described, with a video file available online, at 
this site:
             http://www.syspac.com/~dolphin/stories/orca_vs_shark.html

The orca and the great white are predators that share the same 
prey--primarily seals and sea lions, so they occasionally cross paths. The 
orca is likely to win any arguments due to its larger size. In the 
encounter described on the website referred to above, the orca was about 20 
feet long, with the great white about 10 feet long.