european perch swims in dense vegetation of potamogeton water plants, nature coldwater river biotope aqua

adaptable animal aqua aquadesign aquarium aquascape aquatic attentive background beast behaviour biotic biotope biotopic clear coldwater colourful cosmopolitan dangerous dark dense design ecology enduring eurasian european fauna fin fish fishkeeping fluviatilis free gravel greedy green grey hobby insatiable juvenile looking macro natural nature orange perca perch plants postcard potamogeton predator protection river space stripe substrate swim swims system tank underwater vegetation vulnerable water weed widespread wild