Great white sharks are carnivores that eat seabirds, sea turtles, fish, squid, certain cetaceans (such as dolphins, porpoises and whales), and especially sea lions and seals. Great whites are occasionally observed eating the carcasses of dead whales.
The great white shark is the largest predatory fish on Earth. It has evolved from shark ancestors that lived over 400 million years ago, before the dinosaurs. Despite their portrayal in films and literature, great white sharks rarely eat humans. A great white shark tends to bite once to sample the taste of its prey and let it go if the prey is not one of its preferred meals.