rhodeus uyekii amarus, european bitterling, wide-spread wild small freshwater juvenile fish swims in typical temperate

river fish rhodeus freshwater european amarus wild aquarium temperate biotope small bitterling underwater animal water europe nature weed natural swim gravel native macro widespread acheilognathinae adult cyprinid decorative driftwood clear footage fauna fishkeeping aqua endemic behavior plant algae bio grey closeup eco pond cyprinidae carp