The identity of the fera is disputed. In 1950 Emile Dottrens described Coregonus fera as native to both Lake Geneva and Lake Constance. The coregonines from Lake Constance were named Sandfelchen. In 1997 Maurice Kottelat made a revision and used the name Coregonus fera for the Geneva fera and Coregonus arenicolus for theSandfelchen. The common name fera is still also used for fish that continue to live in Lake Geneva, but it now refers to the introduced Coregonus palaea.
Together with the similarly extinct gravenche (Coregonus hiemalis), the fera was one of the most caught freshwater fishes in Lake Geneva. In 1890 these two fishes constituted 68% of the total captures in the lake. Due to a combination of overexploitation and heavy hybridisation with introduced Coregonus species, it became extremely scarce and was last seen in Lake Geneva in 1920.
- Maurice Kottelat: European Freshwater Fishes. An heuristic checklist of the freshwater fishes of Europe (exclusive of former USSR), with an introduction for non-systematists and comments on nomenclature and conservation; Biologia: Section Zoology vol. 52/5, Slovak Academic Press, Bratislava 1997, ISBN 80-85665-87-5
- Froese, Rainer and Pauly, Daniel, eds. (2010). "Coregonus fera" in FishBase. February 2010 version.