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Thymallus, commonly known as graylings, is a genus of freshwater ray-finned fish and the only genus within the subfamily Thymallinae of the family Salmonidae.Although all Thymallus species can be generically called graylings, without specific qualification the term "grayling" typically refers to the type species Thymallus thymallus, the European grayling.
Panorama of Ružomberok. It is situated at the westernmost reaches of the Sub-Tatra Basin, more exactly its subdivision Liptov Basin, surrounded by the mountain ranges of Chočské vrchy, Greater Fatra and Low Tatras.
Thymallus thymallus, the grayling or European grayling, [3] is a species of freshwater fish in the salmon family Salmonidae.It is the only species of the genus Thymallus (the graylings) native to Europe, where it is widespread from the United Kingdom and France to the Ural Mountains in Russia, and Balkans on the south-east, but does not occur in the southern parts of the continent.
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Like in many rivers around Europe, there are some introduced salmonid fish species in the Neretva. Of these only grayling (Thymallus thymallus) established stable population so far, while the more harmful rainbow trout (Oncorhynchus mykiss) had lower survival rate and accordingly low population growth and small size.
Thymallus baicalensis, also known as the Baikal black grayling, is a Siberian freshwater fish species in the salmon family Salmonidae. Thymallus baicalensis occurs in Lake Baikal , in the inflowing Selenga River and throughout the major Enisei River drainage, and also some eastern tributaries of the Ob River .
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The scientific name of the Arctic grayling is Thymallus arcticus.It was named in 1776 by German zoologist Peter Simon Pallas from specimens collected in Russia. The name of the genus Thymallus first given to grayling (T. thymallus) described in the 1758 edition of Systema Naturae by Swedish zoologist Carl Linnaeus originates from the faint smell of the herb thyme, which emanates from the flesh.