- Seabirds: Seabirds such as gulls, terns, and skuas are known to harass and predate cormorants, especially their young.
- Raptors: Raptors such as eagles, hawks, and falcons are known to hunt cormorants for food.
- Marine Mammals: Marine mammals such as seals, sea lions, and killer whales are known to predate cormorants.
- Fish: Invertebrates such as octopuses and large fish are known to raid cormorant nests and prey upon their eggs and chicks.
- Humans: Cormorants are also hunted by humans for their meat and feathers in some parts of the world.