''Coregonus nilssoni'' is a putative species of whitefish, part of the ''

Coregonus lavaretus ''Coregonus lavaretus'' is a species of freshwater whitefish, in the family Salmonidae. It is the type species of its genus ''Coregonus''. There are widely different concepts about the delimitation of the species ''Coregonus lavaretus'' and abou ...

'' complex (European whitefish). It is a pelagic fish feeding on zooplankton. Its distribution is in lakes of Sweden, southern Norway, Denmark and Poland. In

Sweden Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...

, the name ''C. nilssoni'' has referred to a form of whitefish known as the ''planktonsik''. That is however no more considered a distinct species but an ecotype within '' Coregonus maraena'' ("''Coregonus maraena morphotype nilssoni''"), and not different from "'' Coregonus maraena morphotype megalops''".Coregonus maraena morphotype megalops blåsik
Artfakta. Artdatabanken, SLU

References

{{Taxonbar, from=Q5832941 nilssoni Fish described in 1848