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 / Emerald Notothen (Trematomus bernacchii) in sponge uses antifreeze glycoproteins to keep from freezing in freezing water, Antarctica

Norbert Wu / Emerald Notothen (Trematomus bernacchii) on Polychaete (Isodictya erinacea) notothenioid fish uses antifreeze glycoproteins to keep from freezing in Antarctic water, Antarctica

Norbert Wu / Emerald Notothen (Trematomus bernacchii) on sponge, notothenioid fish uses antifreeze glycoproteins to keep from freezing in Antarctic water, Antarctica

Franco Banfi / Goby, probably (Trematomus bernacchii) eye detail, Antarctic Peninsula, Antarctica, Southern Ocean.

Franco Banfi / Goby, probably (Trematomus bernacchii) portrait, Antarctic Peninsula, Antarctica, Southern Ocean.