dangerous freshwater predator channel catfish, invasive lord of ukrainian temperate cold-water biotope aquarium feels comfortable

039 aggressive america angler animal aquaculture aquadesign aquarium aquatic barbel biotic biotope bitterling cat catfish channel clear closeup coldwater comfortable danger dangerous design driftwood ecology ecosystem fauna feels fish fishkeeping freshwater greedy grey ictaluridae ictalurus instinct invasion invasive juvenile lord mussel natural nature painter planted popular predator prey punctatus reservoir river sand states swim system tank temperate threat ukrainian underwater united voracious water widespread wild