* Leopard seals: Leopard seals are the primary predators of penguins in the Antarctic. They are large, powerful seals that can swim quickly and catch penguins in the water.
* Orcas: Orcas, also known as killer whales, are apex predators that hunt a variety of animals, including penguins. They are found in all oceans and may hunt penguins in both the Arctic and Antarctic.
* Seals: Other species of seals, such as fur seals and sea lions, may also prey on penguins.
* Sharks: Some species of sharks, such as the great white shark, may also eat penguins.
* Giant petrels: Giant petrels are large seabirds that may scavenge on penguin carcasses or may even kill live penguins.
* Human beings: Humans have also hunted penguins for food and other purposes. However, penguin hunting is now largely banned in most countries.