juvenile individual of prussian carp or gibel carp, wide-spread and very common freshwater fish feel fine in temperate coldwater

algae animal aqua aquarium asian behavior biotope carassius carp chinese clear closeup coldwater common decorative design driftwood eco ecological ecology endemic european farming fauna feel fin fine fish fishkeeping free freshwater gibel gibelio gravel grey healthy individual juvenile lake line litter live local look macro moderate natural nature pond protection prussian river space tank temperate threat underwater very water weed widespread