rhodeus amarus, european bitterling, young male ornamental freshwater fish in biotope aquarium

acheilognathinae adult amarus animal aqua aquarium aquatic biotope bitterling caudal ceratophyllum clear closeup cyprinid decorative demersum dorsal driftwood endemic europe european eye fauna fin fish fishkeeping freshwater gravel grey gudgeon hornwort line lips live local lutea macro male mouth native natural nature nuphar operculum ornamental photo plant rhodeus river side squama tank temperate topmouth underwater view water waterlily weed widespread wild young