female of rhodeus amarus, european wild fish live peaceful with crucian carp in a densely planted natural freshwater biotope

active adult amarus animal aqua aquarium aquatic behaviour biotope bitterling carp clear clearwater coldwater colorful condition controlled crucian cyprinidae decorative densely easy ecology endemic europe european fauna female fin fish fishkeeping free freshwater funny gudgeon happy healthy ichthyology keep live local look macro natural nature ornamental peaceful planted plants pondweed potamogeton protection rhodeus river sand space substrate swim tank temperate topmouth underwater vegetation water weed widespread wild