Two adult Adelie penguins (Pygoscelis adeliae) "porpoising" for speed in the Weddell Sea on the Northeast side of the Antarctic Peninsula.

bird birds adult adelie penguins pygoscelis adeliae northeast north east north east antarctic peninsula weddell sea flightless seabird antarctica antarctic pygoscelidae brush tail brush tail penguins porpoising porpoise two birds pair couple swimming swim speed dive diving surface surfacing nobody