''Thymallus tugarinae'', also known as the Lower Amur grayling, is a species of freshwater fish in the

salmon Salmon () is the common name for several list of commercially important fish species, commercially important species of euryhaline ray-finned fish from the family (biology), family Salmonidae, which are native to tributary, tributaries of the ...

family. It is found in the lower reaches of the

Amur river The Amur (russian: река́ Аму́р, ), or Heilong Jiang (, "Black Dragon River", ), is the world's List of longest rivers, tenth longest river, forming the border between the Russian Far East and Northeast China, Northeastern China (Inne ...

on the border of the

Russian far east The Russian Far East (russian: Дальний Восток России, r=Dal'niy Vostok Rossii, p=ˈdalʲnʲɪj vɐˈstok rɐˈsʲiɪ) is a region in Northeast Asia. It is the easternmost part of Russia and the Asian continent; and is admini ...

and

Heilongjiang Province Heilongjiang () formerly romanized as Heilungkiang, is a province in northeast China. The standard one-character abbreviation for the province is (). It was formerly romanized as "Heilungkiang". It is the northernmost and easternmost province ...

of China. It was first described in 2007 and is sometimes mistaken for the Amur grayling.

Description

The Lower Amur grayling can reach a recorded length of 25.5 cm (10 inches) and 6 years old. There is a wide red to maroon edging with the width 5–6 mm seen along the upper margin of the

dorsal fin A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom. Many species of animals possessing dorsal fins are not particularly closely related to each other, though through conv ...

. 4-5 rows of same-color spots are observed to be in parallel with the edging. There is also bright orange sinuous stripes between the scale rows going along the body. The upper jaw overlaps with the anterior margin of the eye.

Life cycle

The Lower Amur grayling spawns in rivers of the Amur Basin from the middle to the end of May. The autumn downstream migration in tributaries of the lower Amur river takes place from September to October. The fish mostly feed on

mayfly Mayflies (also known as shadflies or fishflies in Canada and the upper Midwestern United States, as Canadian soldiers in the American Great Lakes region, and as up-winged flies in the United Kingdom) are aquatic insects belonging to the ord ...

and stonefly larvae, imago caddis and other bugs. It is also reported that in the Anyui River, they are feed on various zoobenthos organisms.

References

{{Taxonbar, from=Q5676823 Thymallus Freshwater fish of Asia Fish described in 2007