freshwater fish sunbleak swim in biotope aqua with driftwood on sand bottom

active adult animal aquadesign aquarium aquatic background behaviour belica biotope blurred body bottom captive clear coldwater conditions controlled cyprinidae decorative delineatus driftwood dwarf ecology endemic enduring europe european explore fauna fish fishkeeping free freshwater gravel grey ichthyology leucaspius litter live local moderate moderlieschen native natural nature plants protection research river sand sensitive slender small space sunbleak swim tank temperate underwater vulnerable water weed widespread wild wood