Author: Linnaeus, 1758
Comments: Lives in lakes at 100-200 m depth.  Feeds predominantly on zooplankton.  Also preys on other benthic invertebrates during summer.  Spawns close to underwater springs at 50-300 m depths (Ref. 59043).  Threatened due to habitat destruction, pollution and overfishing (Ref. 26100) and possibly due to the introduction of exotic <i>Coregonus</i> and Salmonidae (Ref. 59043).