This is an amazing fact about these ice fish. Another very unique adaptation that the ice fish has made toward survival in the cold temperatures, is that it has no hemoglobin in its blood. Hemoglobin is the iron-containing respiratory pigment in a vertebrates red blood cells. With no hemoglobin, the ice fish's blood is translucent, and their gills and internal organs are colourless. The oxygen is carried around the ice fishes body in plasma rather than the hemoglobin.
Ice fish have beaks in place of mouths.
This is for catching krill and other tiny marine invertebrates that live on the ice. The fishes mouth is actually inside the beak. Unlike the barren continent of Antarctica, the waters surrounding it are full of life. Tiny, single celled plants known as phytoplankton are the primary food source. Many other species, all of which live in the waters around Antarctica, depend on phytoplankton for life.