How do fish survive freezing cold water?
Today’s Video of the Day from the American Chemical Society series Reactions explains how fish manage to survive the freezing cold waters surrounding Antarctica.
Even though the water in this region rarely rises above freezing, the fish are equipped with a type of antifreeze in their blood.
The fish swallow tiny ice crystals from the seafloor that should freeze them from the inside out. However, the biochemical antifreeze lowers the internal freezing point of the fish so that it is below the surrounding waters, meaning that the fish literally cannot freeze.
Video Credit: American Chemical Society