juvenile dangerous freshwater predator channel catfish, ictalurus punctatus in cold-water reservoir biotope

aggressive america angler animal aquaculture aquarium aquatic barbel barbels biotic biotope cat catfish channel clear close coldwater danger dangerous driftwood ecology ecosystem fauna fish fishkeeping freshwater greedy grey head ictaluridae ictalurus instinct invasion invasive juvenile large mouth natural nature popular predator prey punctatus reservoir river sand states swim system tank threat underwater united voracious water widespread wild