1. Phytoplankton
Images copyright Smithsonian Environmental Research Center

2. Northern Krill
Image Courtesy of Wikipidia Commons

3. Arctic Cod
Photo Courtesy of NOAA Arctic Image Gallery

4. Walrus
Alaska, Bering Sea
Source NOAA's Ark - Animals Collection Image ID: anim0022 ([1])
Author Captain Budd Christman, NOAA Corps
Image Courtesy of Wikipidia Commons

5. Polar Bears
Franklin Strait, Northwest Passage, Nunavut, Canada, August 2009
Photo Courtesy of David Thoreson, expedition photographer for Around the Americas

6. Narwhals
Date Source National Institute of Standards and Technology
Author Glenn Williams
Image Courtesy of Wikipidia Commons