freshwater fish sunbleak swim in biotope aquarium, funny and demanding pet on blurred background

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