Penguins are not omnivores; they are primarily carnivorous. Their diet mainly consists of fish, squid, and other small marine creatures. Penguins are skilled hunters and spend a significant amount of time in the water, where they catch their prey.
While penguins do not eat plants, they may occasionally ingest small amounts of algae or other plant material indirectly through their prey. However, this does not make them omnivores. Their digestive systems are adapted to process meat, and they rely on a diet rich in protein and fat to survive in their cold environments.
In summary, penguins are carnivores that thrive on a diet of marine animals, and their feeding habits are well-suited to their aquatic lifestyle.