juvenile female of european bitterling, rhodeus amarus, wide-spread wild freshwater fish, rare pet

acheilognathinae adult algae amarus animal aqua aquarium aquatic behavior biological biotope bitterling clear closeup conservation cyprinid decorative diversity driftwood eco ecological endemic europe european fauna female fin fish fishkeeping freshwater gravel grey gudgeon juvenile leaf litter live local look macro moderate native natural nature oak pet rare rhodeus river tank temperate topmouth typical underwater weed widespread wild