''Thymallus svetovidovi'', also known as the Upper Yenisei 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 upper reaches of the
Yenisei River
The Yenisey (russian: Енисе́й, ''Yeniséy''; mn, Горлог мөрөн, ''Gorlog mörön''; Buryat: Горлог мүрэн, ''Gorlog müren''; Tuvan: Улуг-Хем, ''Uluğ-Hem''; Khakas: Ким суғ, ''Kim suğ''; Ket: Ӄук ...
and in western Mongolia.
Description
The body of Upper Yenisei grayling is mostly grayish-black, with dark
dorsum and white abdomen. There are two weakly pronounced parallel brownish yellow stripes running from the throat to the ventral fins. Beyond
gill cover
The operculum is a series of bones found in bony fish and chimaeras that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding.
Anatomy
The opercular series contains four bon ...
to the insertion of the seventh unbranched ray of dorsal fin, eight small black spots of different shapes with a diameter of 1–3 mm are scattered.
The Upper Yenisei grayling can reach a maximum recorded length of 39.6 cm (15.6 inches).
References
{{Taxonbar, from=Q6431202
Thymallus
Freshwater fish of Asia
Fish described in 2009