''Brachymystax lenok'', the sharp-snouted lenok,Kartavtseva, I.V.; Ginatulina, L.K.; Nemkova, G.A.; and Shedko, S.V. (2013). ''Chromosomal study of the lenoks, Brachymystax (Salmoniformes, Salmonidae) from the South of the Russian Far East.'' Journal of Species Research 2(1):91-98. is a

salmonid Salmonidae (, ) is a family of ray-finned fish, the only extant member of the suborder Salmonoidei, consisting of 11 extant genera and over 200 species collectively known as "salmonids" or "salmonoids". The family includes salmon (both Atlantic a ...

fish distributed in rivers and lakes in northeastern Asia. It formerly included the blunt-snouted lenok, but recent authorities typically treat the latter as a separate species, '' B. tumensis'', based on differences in

morphology Morphology, from the Greek and meaning "study of shape", may refer to: Disciplines *Morphology (archaeology), study of the shapes or forms of artifacts *Morphology (astronomy), study of the shape of astronomical objects such as nebulae, galaxies, ...

and

genetics Genetics is the study of genes, genetic variation, and heredity in organisms.Hartl D, Jones E (2005) It is an important branch in biology because heredity is vital to organisms' evolution. Gregor Mendel, a Moravian Augustinians, Augustinian ...

.Bo, M. A.; and Jiang, Zuo-fa (2007). ''Genetic diversity and relationship between two species of Brachymystax in Wusuli River revealed by microsatellites.'' Journal of Fishery Sciences of China 14: 39-45.Froufe, E.; Alekseyev, S.; Alexandrino, P.; and Weiss, S. (2008).
The evolutionary history of sharp- and blunt-snouted lenok (''Brachymystax lenok'' (Pallas, 1773)) and its implications for the paleo-hydrological history of Siberia.
' BMC Evolutionary Biology 8: 40. As presently defined, the sharp-snouted lenok is widespread in central and eastern Russia, and also found widely in northern Mongolia, locally in northeastern Kazakhstan (

Irtysh Basin The Irtysh is a river in Russia, China, and Kazakhstan. It is the chief tributary of the Ob and is also the longest tributary in the world. The river's source lies in the Mongolian Altai in Dzungaria (the northern part of Xinjiang, China) clo ...

) and northeastern China (

Amur Basin The Amur River () or Heilong River ( zh, s=黑龙江) is a perennial river in Northeast Asia, forming the natural border between the Russian Far East and Northeast China (historically the Outer and Inner Manchuria). The Amur ''proper'' is ...

).Ratschan, C. (2013).
Trout's Siberian Siblings
'. Chasing Silver 1: 86-96. The blunt-snouted lenok (''B. tumensis'') is found widely in southeastern Russia and more locally in northeastern and central parts of the country, as well as northeastern Mongolia (Amur Basin), northern China and Korea. Although the two generally are found in separate areas, there are also regions where their ranges overlap such as the Amur Basin. The sharp-snouted lenok is widespread overall, but some populations, especially in China, have declined due to

overexploitation Overexploitation, also called overharvesting or ecological overshoot, refers to harvesting a renewable resource to the point of diminishing returns. Continued overexploitation can lead to the destruction of the resource, as it will be unable to ...

and pollution. This species grows to a

total length Fish measurement is the measuring of individual fish and various parts of their anatomies, for data used in many areas of ichthyology, including taxonomy and fishery biology. Overall length Standard length (SL) is the length of a fish measured f ...

of . Korea is considered to be the southernmost limit of this fish, and in

South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia. It constitutes the southern half of the Korea, Korean Peninsula and borders North Korea along the Korean Demilitarized Zone, with the Yellow Sea to the west and t ...

, various places have been declared protected areas for its protection: 2.36 km² in

Jeongseon Jeongseon (''Jeongseon-gun'') is a county in the province of Gangwon-do, South Korea. It is famous as the hometown of "Jeongseon Arirang," a traditional Korean folksong. It is also the hometown of actor Won Bin and footballer Seol Ki-hyeon. H ...

, 24.23 km² in

Bonghwa Bonghwa County (''Bonghwa-gun'') is a county in North Gyeongsang Province, South Korea. It lies inland, at the northern edge of the province, and borders Gangwon province to the north. To the east it is bounded by Yeongyang and Uljin counties, ...

, and in

Hongcheon Hongcheon (''Hongcheon-gun'') is a county and city in Gangwon Province, South Korea. The city lies on the northern bank of the Hongcheon River, southeast of Chuncheon. The terrain of the county is mainly mountainous and contains hot springs in th ...

References

lenok Lenoks, otherwise known as Asiatic trout or Manchurian trout,James Card: Fly fishing in South Korea.' Retrieved 22 June 2015. are salmonid fish of the genus ''Brachymystax'', native to rivers and lakes in Mongolia, Kazakhstan, wider Siberia (incl ...

Fish of Asia Fish described in 1773 Taxa named by Peter Simon Pallas {{Salmoniformes-stub