Coregonus pallasii is a putative species of whitefish in the family Salmonidae,[1] part of the Coregonus lavaretus complex (European whitefish).
It is a lacustrine fish, indicated to live in large lakes of Sweden, Finland and Karelia (Russia). A typical size is 42 cm and maximum size 60 cm.[1]
In Sweden, the name C. pallasii has been used of a whitefish form known as aspsik in the large lakes of the northern river basins, including lakes Pakijaure, Hornävan, Storlaisan, Storuman, Vojmsjön and Storlögdan.[1] Currently these populations are no more considered separate from the common whitefish, but as a morphotype within Coregonus maraena.[2] Also in Finland, only one species of the C. lavaretus group is recognized, and C. lavaretus f. pallasi has been used to denote the zooplankton-feeding ecomorph "northern densely-rakered whitefish".[3]