Gregarious lacustrine forms and anadromous estuarine forms, rarely in full saltwater. Feeds on planktonic crustaceans, or larger benthic (waterfloor level) crustaceans in brackish water. Movement in water column as a function of zooplankton repartition. Likely to benefit from environmental regulations.
Europe: Native to Lake Bourget (France) and Geneva (Switzerland, France). Has been stocked into many other places in Europe outside its native range. Asia: introduced to Iran.