Abyssocottus korotneffi is a species of ray-finned fish belonging to the family Cottidae, the typical sculpins. These sculpins are endemic to Lake Baikal in Russia. It is known to dwell at a depth range of , most commonly between . Males can reach a maximum total length of and females . Maximum age is 12 years. Females harbour about 20 eggs in each ovary.
The fish is named in honor of biologist Alexei Alexeievich Korotneff (1852-1914), of the Kiev University, who dredged all the sculpins from Lake Baikal that Berg examined, including the type of this one.
A. korotneffi feeds predominantly on debris and amphipod crustaceans.