Common bream
A deep-bodied, laterally compressed fish with a protrusible mouth adapted to bottom-feeding.
Coregonus lavaretus
Русское название: Сиг европейский
The European whitefish complex has complicated taxonomy, and regional populations may differ in form and ecology. Many occur in cool, oxygen-rich lake waters and can be affected by eutrophication.

Northern and central Europe
Cool lakes and some rivers
Images and brief descriptions are for learning, not for reliably identifying a specimen. Take particular care with poisonous plants and mushrooms.
Identification is never guaranteed by a photo. Scientific names are used to reduce confusion between local names.