Adélie Penguins, Paulet Island, Antarctica

“As we motored around Paulet Island in a Zodiac boat, these two curious penguins waddled across an iceberg to get a closer look at us.” -- Nature's Best photographer, Phillip Colla.

See more beautiful ocean photos in our slideshow of winners from the 2010 Nature's Best Ocean Views photo contest. 

These Adélie penguins live in Antarctica and rely on tiny crustaceans, called krill, as their main food source. It is unknown how their populations will react to changes in the amount of sea ice and krill due to warming temperatures or overfishing