Certain layers within the sea ice can be stained by mass developments of ice algae.

Certain layers within the sea ice can be stained by mass developments of ice algae. In the Arctic such mass developments typically occur in the bottom 10-20 cm of the ice floes. Image courtesy of Rolf Gradinger, University of Alaska Fairbanks (UAF)

Related Links

The Hidden Ocean, Arctic 2005

The Hidden Ocean Arctic 2005: Sea Ice

NOAA Ocean Explorer Gallery