1. icefish - Noun
2. icefish - Verb
Any member of notothenioid family Channichthyidae; these Antarctic fishes are named for the lack of hemoglobin in their blood
The noodlefish (family Salangidae in order Osmeriformes).
icefish (third-person singular simple present icefishes, present participle icefishing, simple past and past participle icefished)
Alternative form of ice fish
The former is a red-blooded animal while the latter belongs to icefish family, whose 16 species have no hemoglobin in their blood, a disadvantage just about anywhere else but in the oxygen-rich waters of the Southern Ocean. Source: Internet
The icefish obtain oxygen in physical solution through their gills and directly through their skin. Source: Internet
O’Brien thought part of the answer might involve the marked differences between the mitochondrial structures of the icefish and other notothenioids. Source: Internet