Though sharks are considered apex predators, they are often eaten by humans and are sometimes eaten by killer whales. Shark embryos from different fathers will also eat each other in utero, with the largest embryo of the bunch usually winning out.
Killer whales have been known to eat sharks in the wild, though they are not a preferred food source as they consider the shark dangerous.
Humans are the primary predator of sharks. Though consumption of shark meat is relatively rare in humans, it is widely available for purchase throughout the world. The shark's fin is also considered a delicacy and a folk remedy throughout Asia.