Everyone remembers the "rare" Great White pieces in Shark Bites fruit snacks, but they occasionally worked in some other special pieces -- like this one shaped like a shark's tooth. | Dinosaur Dracula

Great white sharks have an unique ability to retain heat in their bodies, even in colder waters. Could this be behind a series of shark bites in cold, winter waters? Marine biologist Diva Amon and the Shark Attack 360 team investigate. Tune in to Shark Attack 360 on Sundays at 8pm, on National Geographic WILD UK. | National Geographic UK