* Fish: This is their primary food source, and they are expert swimmers who can catch fish with their beaks.
* Squid: Another common prey for penguins, especially in deeper waters.
* Krill: Tiny crustaceans that penguins often eat in large quantities.
* Other invertebrates: Penguins may also eat jellyfish, shrimp, and other small sea creatures.
So, penguins are definitely predators, playing an important role in their marine ecosystems by controlling the populations of their prey.