Norbert Wu / Emerald Notothen (Trematomus bernacchii) on rocks, notothenioid fish has glycoproteins for antifreeze in blood to keep from freezing, silvery color acts as camouflage, Antarctica

Norbert Wu / Fish, has glycol-proteins in blood to keep from freezing in Antarctic water, peering out from a sponge, Antarctica

Colin Monteath / Antarctic fish on ice, their blood contains glyco-protein that acts as anti-freeze, Port Lockroy, Antarctica