common roach and barbel gudgeon, twig driftwood, freshwater wild caught domesticated fish in european temperate river

rutilus cyprinidae gobio gregarious predator omnivore slender body coldwater ukraine pontocaspian current captive water clear natural instinct aqua animal aquatic fishkeeping underwater habitat ornamental closeup fish tank gravel litter decoration ryoboku feel good sand native fauna macro widespread ecology threat nature protection algae space local grey ichthyology vulnerable blurred background inspiration