female of gudgeon or bitterling dwarf fish in spawning coloration swim in a planted nature freshwater

acheilognathinae adult amarus animal aqua aquarium aquatic beautiful behaviour biotope bitterling clear coldwater coloration copy cyprinid decor decoration decorative design driftwood dwarf ecology endemic europe european eye fauna female fin fish fishkeeping free freshwater grey gudgeon line litter live local look macro natural nature ornamental planted protection rhodeus river roots space spawning substrate swim tank temperate threat topmouth underwater vegetation water widespread wild