''Coregonus trybomi'' is a

freshwater whitefish The freshwater whitefish are fishes of the subfamily Coregoninae, which contains whitefishes (both freshwater and anadromous) and ciscoes, and is one of three subfamilies in the salmon family Salmonidae. Apart from the subfamily Coregoninae, ...

in the family Salmonidae. It is a spring-spawning type of

cisco Cisco Systems, Inc., commonly known as Cisco, is an American-based multinational corporation, multinational digital communications technology conglomerate (company), conglomerate corporation headquartered in San Jose, California. Cisco develo ...

, which probably has evolved from

sympatric In biology, two related species or populations are considered sympatric when they exist in the same geographic area and thus frequently encounter one another. An initially interbreeding population that splits into two or more distinct species s ...

vendace (''Coregonus albula'') independently in a number of

Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...

lakes. Only one of those populations survives, and it is therefore considered Critically Endangered by the

IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biol ...

. The status of ''Coregonus trybomi'' as a distinct species is however questionable. By Swedish authorities it is treated as a morphotype or ecotype, not an independent species. It was listed as "

Data Deficient A data deficient (DD) species is one which has been categorized by the International Union for Conservation of Nature (IUCN) as offering insufficient information for a proper assessment of conservation status to be made. This does not necessarily ...

" in 2010 but excluded from the national red list in 2015.Rödlistade arter i Sverige 2015

References

* * trybomi Endemic fauna of Sweden Freshwater fish of Europe Critically endangered animals Endangered biota of Europe Taxa named by Gunnar Svärdson Fish described in 1979 Taxonomy articles created by Polbot {{Salmoniformes-stub