Known from lakes Attersee and Mondsee (Ref. 13696); also reported to be common in the second largest lake, Traunsee lake, a few kilometers east of Attersee (Günther Neuhofer, pers. comm 09/07). Mondsee population was introduced to Attersee in the early 20th century, After introduction early spawning individuals were recorded from Attersee. Further studies are needed to demonstrate that the Mondsee population really belongs to the present species. Today, about half of the Coregonus harvested in Mondsee result from stocking (Ref. 59043).