Sharks eat octopus. Octopus also eats sharks. Under normal circumstances, it is not a problem for sharks to eat octopus, but big octopus can eat sharks, and most of them feed on marine animals.

Sharks use the carrion of injured marine mammal fish to take members out of animal corners. Sharks also go to the garbage and other wastes left on the ship. In addition, some sharks prey on various marine mammals, fish, turtles, crabs and other animals. Some sharks can go without eating for months, and the great white shark is one of them.