What the Fish? Episode 20: Under the Ice
The Blood Runs Cold!
While the prospect of living on the icy contintent of Antarctica sounds about as apealing as living on the planet Hoth, many organisms from across the tree of life call this chilling place their home. Under the ice is a thriving marine habitat that is teeming with life that handles the cool water with fascinating evolutionary features. Many Antarctic icefishes, such as species in the suborder Notothenioidei, frequently live in water that range in temperature from –2°C to 4°C due in part to the evolution of an antifreeze glycoprotein that is found in their blood, with many species in this group possessing little to no hemoglobin in their bloodstream. Much of the biodiversity that is found in the Southern Ocean are thought to be highly susceptible to potential long term changes in climate over time, icluding phytoplankton, and fishes.
So long, and thanks for all the fish!