River fishs are fish species that live permanently in rivers and only occasionally enter flowing lakes. They usually do not make significant movements. They spawn in or near their habitats. Typical representatives of river fish are: Catfish, Channel Catfish, Eel, Snakehead, Burbot, Burbot, Loach, Hungarian Minnow, Ukrainian Minnow, Sterlet, Danube Salmon, Brook Trout, European Grayling.