Great white sharks are apex predators; they are at the top of the food chain. Occasionally great white sharks will encounter a killer whale or another shark of comparable size (Martins and Knickle, 2009). These species pose a small threat to great white sharks.
- Martins, C., C. Knickle. 2009. "Florida Museum of Natural History" (On-line). Accessed April 08, 2009 at http://www.flmnh.ufl.edu/fish/Gallery/Descript/Whiteshark/whiteshark.html.