The Sana in Bosnia-Herzegovina is one of the six most important rivers for the globally threatened Danube Salmon (Hucho hucho). These river provide the backbone of the remaining Huchen population in Europe. Nevertheless, the Austrian-German energy company Kelag is currently constructing a hydropower plant at the upper reach of the Sana, even though the Huchen cannot survive in rivers obstructed by hydropower plants. Further dams are planned downstream.