Occurs mainly in the German Baltic basin ascending the Odra and Peene rivers to spawn and seems to have vanished from other rivers where the species was also known to spawn (Refs. 83311 , 89485). Reintroduced into the Treene, Elbe and Rhine rivers with fish originating from the Vida River in Denmark (Refs. 83311, 89470). Apparent abundance in Germany only reflects the massive stocking programs without which the populations would rapidly decline.

Efforts in Schleswig-Holstein in 1996 to re-establish populations from brood-stock from Vorpommern (Ref. 41851, also as 'balticus').

Reported from Mecklenburg-Vorpommern as Coregonus lavaretus balticus (Ref. 27963) and from small rivers of Schleswig-Holstein (Ref. 59043).

Occurrence questionable in River Schlei (Ref. 13696).

Status, assessed according to the latest national report for the habitats directive reporting period 2000-2006, was "unfavorable/inadequate" for the Continental biogeographic region (German Baltic Sea) (Refs. 88151, 88160).

National status of threat of freshwater stocks: endangered (Ref. 83311).

Endangered in the Baltic Sea (as C. balticus, Ref. 88159).

Critically endangered in Schleswig-Holstein (Ref. 88198).

On the watch-list in Mecklenburg-Western Pomerania (Ref. 88199).

Threats for Baltic houting in the Baltic Sea and adjacent river systems due to human activities: obstruction in rivers, restocking, chemical pollution, fisheries, eutrophication (Refs. 59043, 89548).