rhodeus amarus, european bitterling, wide-spread wild fish swims near unio pictorum, painter`s mussel, aquatic bivalve mollusk

adaptable adult amarus animal aqua aquarium aquatic background biotope bitterling bivalve clear closeup coldwater decorative detritis endemic eurasian european fallen fauna fish fishkeeping freshwater gravel hobby leaves litter live local macro mollusc mollusk mussel native natural nature oak ornamental painters photo pictorum rhodeus river sand shell species specimen spotlight substrate swims tank underwater unio unionidae valve water widespread wild yellow