The grayling prefers cold, clean, running riverine waters, but also occurs in lakes and, exceptionally, in brackish waters around the Baltic Sea. Omnivorous, the fish feeds on vegetable matter, as well as crustaceans, insects and spiders, mollusks, zooplankton, and smaller fishes, such as Eurasian minnows. Grayling are also prey for larger fish, including the huchen (Hucho hucho). With the Arctic grayling, T. thymallus is one of the economically important Thymallus species, being raised commercially and fished for sport. Learn more about European Grayling