adult pair of european bitterling, rhodeus amarus, ornamental fish show spawning behaviour in a densely planted natural freshwater

active adult amarus animal aqua aquarium aquatic behaviour bitterling clear coldwater colorful cyprinidae decorative densely easy ecology endemic europe european fauna fin fish fishkeeping free freshwater funny grey gudgeon happy healthy ichthyology keep line local look macro mouth natural nature ornamental pair planted plants protection rhodeus river show space spawning swim tank temperate topmouth underwater water weed widespread wild