The grayling (Thymallus thymallus) is a species of freshwater fish in the salmon family (family Salmonidae). The grayling is widespread throughout northern Europe, from the United Kingdom and France to the Ural Mountains in Russia. While it was introduced to Morocco in 1948, it does not appear to have become established there. The grayling grows to a maximum recorded length of 60 cm (24 in) and a maximum recorded weight of 6.7 kg (15 lb). Individuals of the species have been recorded as reaching an age of 14 years. The grayling prefers cold, clean, running riverine waters, but also occurs in lakes and, exceptionally, in brackish waters around the Baltic Sea. The grayling is a protected species listed in appendix III of the Bern Convention.