''Coregonus alpinus'' is a

species In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...

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 Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Salmonidae Salmonidae is a family of ray-finned fish that constitutes the only currently extant family in the order Salmoniformes . It includes salmon (both Atlantic and Pacific species), trout (both ocean-going and landlocked), chars, freshwater whitefish ...

. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

Lake Thun Lake Thun (german: Thunersee) is an Alpine lake in the Bernese Oberland in Switzerland named after the city of Thun, on its northern shore. At in surface area, it is the largest Swiss lake entirely within a single canton. The lake was created ...

, in Switzerland's

Interlaken , neighboring_municipalities= Bönigen, Därligen, Matten bei Interlaken, Ringgenberg, Unterseen , twintowns = Scottsdale (USA), Ōtsu (Japan), Třeboň (Czech Republic) Interlaken (; lit.: ''between lakes'') is a Swiss town and mun ...

region, where it is found in deep water. The maximum length recorded for this species is . It feeds on

chironomid The Chironomidae (informally known as chironomids, nonbiting midges, or lake flies) comprise a family of nematoceran flies with a global distribution. They are closely related to the Ceratopogonidae, Simuliidae, and Thaumaleidae. Many species ...

s and other bottom-dwelling

invertebrate Invertebrates are a paraphyletic group of animals that neither possess nor develop a vertebral column (commonly known as a ''backbone'' or ''spine''), derived from the notochord. This is a grouping including all animals apart from the chordate ...

s. It is known as the kropfer, a name also applied to the probably extinct species ''

Coregonus restrictus ''Coregonus restrictus'' is an extinct freshwater fish from the family Salmonidae. It was originally discovered in Lake Morat, Switzerland, in 1885. In 2008 it was included on the IUCN Red List The International Union for Conservation of ...

''.

References

* * alpinus Fish described in 1885 Endemic fauna of Switzerland {{Salmoniformes-stub