* Fish: This is the primary prey of most seabirds, and it includes species like sardines, anchovies, herring, and mackerel.
* Squid: Squid are also a common food for seabirds, especially those that live in deeper waters.
* Krill: Krill are small, shrimp-like crustaceans that are eaten by many seabirds, especially those that live in the Arctic and Antarctic.
* Other crustaceans: Seabirds also eat other types of crustaceans, such as shrimp, crabs, and lobsters.
* Marine mammals: Some seabirds, such as the giant petrel and the skua, prey on marine mammals such as seals and penguins.
* Seabirds also eat other seabirds, including their own young.
* Other prey: Seabirds may also eat other types of prey, such as insects, jellyfish, and even eggs and chicks of other seabirds.