Icefish have more blood capillaries in their skin and fins which can absorb oxygen directly from the sea water. About 30-40% of the oxygen is absorbed across the skin, which is totally devoid of scales, making it thin to allow oxygen to diffuse across it more easily.
Icefish have transparent and scaleless skin and without scales, oxygen diffuses directly through Icefish skin. They also possess antifreezing protein which prevents the blood from freezing.
Therefore, ICEFISH HAVE SCALELESS SKIN and it is a characteristics that affects the diffusion of oxygen into the Icefish's blood.
