Coregonus is a diverse genus of fish in the salmon family (Salmonidae). The type species is Coregonus lavaretus. The Coregonus species are known as whitefishes. The genus contains at least 68 described extant taxa, but the true number of species is a matter of debate.Several species, including the Arctic cisco (C. autumnalis), the Bering cisco (C. laurettae), and the least cisco (C.