voracious freshwater predator channel catfish, ictalurus punctatus in european cold-water river biotope aquarium

aggressive america animal aqua aquarium aquatic barbel behaviour biotic biotope cat catfish channel clear close coldwater danger dangerous driftwood ecology ecosystem european exploration fauna fish fishkeeping freshwater gravel greedy grey habit ictaluridae ictalurus instinct invasion invasive juvenile lips macro mouth natural nature potamogeton predator punctatus river sand states swim system tank threat underwater united voracious water widespread wild