european bitterling, rhodeus amarus, small wild freshwater adult male fish in typical moderate water biotope aquarium

acheilognathinae adult algae amarus animal aqua aquarium aquatic behavior bio biotope bitterling caudal clear closeup cyprinid decorative dorsal driftwood eco ecological endemic europe european eye fauna fin fish fishkeeping freshwater gravel grey gudgeon line lips litter live local look macro male moderate mouth native natural nature photo rhodeus river small tank temperate topmouth typical underwater water weed widespread wild