rhodeus amarus, european bitterling, young male freshwater fish search for food in leaf litter in biotope aquarium

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