Nature & Environment
Animals at the extremes: polar biology
...work of pumping. As well as being large (up to 1m long), icefish are active predators that swim in the surface waters and use oxygen at about the same rate as red-blooded antarctic fish such as Pleuragramma or Notothenia (see Figures 23a and b). Icefish blood contains solutes and a few white blood cells, so it is a yellowish, watery fluid similar to mammalian lymph. Large...
