A great white shark (Carcharodon carcharias) swims among a shoal of mackerel at Isla Guadalupe, Mexico. Great white sharks' reputation as ferocious predators is well-earned, yet they are not indiscriminate "eating machines". Although the 1975 film Jaws provided the shark with the image of a "man eater" in the public mind, they typically do not target humans as prey.Photo credit: Terry Goss