european bitterling, female of wide-spread wild species spins around mussel of unio pictorum, aquatic bivalve mollusk, spawn

039 adaptable adult amarus animal aqua aquadesign aquarium aquatic background biotic biotope bitterling bivalve breeding clear coldwater conditions controlled decorative design detritus driftwood eggs endemic eurasian european exotic fauna female fish fishkeeping freshwater gravel habitat hobby lay litter live local macro mollusk mussel nano native natural nature ornamental painter pictorum ready rhodeus river sand shell spawn species specimen spins substrate tank temperate underwater unio unionidae valve water widespread wild yellow