spawning pair of european bitterling, rhodeus amarus, beautiful ornamental adult fish in a coldwater temperate freshwater biotope

acheilognathinae adult amarus animal aqua aquarium aquatic beautiful behaviour biotope bitterling clear coldwater cyprinid decorative driftwood endemic europe european eye fauna fin fish fishkeeping freshwater gravel grey gudgeon line litter live local look macro mouth natural nature ornamental pair rhodeus river spawn spawning tank temperate topmouth underwater water widespread wild