* Killer whales: These large whales are also known as "orca" and are apex predators that hunt in pods. They can swim very quickly and can easily catch penguins.
* Fur seals: These seals are smaller than leopard seals but are still powerful predators. They can weigh up to 600 pounds and have sharp teeth that can kill penguins.
* Sharks: Some species of sharks, such as the great white shark, will also prey on penguins. Sharks can swim very quickly and can easily catch penguins in the water.
* Giant petrels: These large birds are scavengers and will often feed on dead or dying penguins. They have sharp beaks and claws that they can use to tear apart penguin carcasses.