rhodeus amarus, european bitterling, ornamental adult male freshwater fish in biotope aquarium, nature photo

acheilognathinae adult amarus animal aqua aquarium aquatic behaviour biotope bitterling bottom caudal clear closeup cyprinid decorative dorsal driftwood endemic europe european eye fauna fin fish fishkeeping freshwater gravel grey gudgeon leaf line lips litter live local look macro male mouth native natural nature operculum ornamental photo plant rhodeus river squama tank temperate topmouth underwater water weed widespread wild