Fish: Sharks prey on a wide variety of fish, including bony fish, cartilaginous fish, and even other sharks. Some of the most common fish that sharks eat include herring, mackerel, tuna, and sardines.
Marine mammals: Sharks also prey on marine mammals, such as seals, sea lions, and porpoises. Some of the most common marine mammals that sharks eat include the California sea lion, the harbor seal, and the bottlenose dolphin.
Seabirds: Sharks also prey on seabirds, such as gulls, terns, and albatrosses. Some of the most common seabirds that sharks eat include the black-legged kittiwake, the northern gannet, and the Laysan albatross.
Squid: Sharks also prey on squid, which are cephalopods. Squid are a common food source for sharks, and they can make up a significant portion of their diet.
Crustaceans: Sharks also prey on crustaceans, such as crabs, shrimp, and lobsters. Crustaceans are not typically a major food source for sharks, but they can be important in some areas.
Sea turtles: Sharks also prey on sea turtles, which are reptiles. Sea turtles are not a major food source for sharks, but they can be important in some areas.
In addition to these primary food sources, sharks will also opportunistically eat other animals that they encounter, such as carrion, dead fish, and even garbage.