adult pencilfish, dim light in brown tannin stained water, ornamental blackwater fish native to rio negro

acidic adult amazonia amazonian america animal aqua aquarium aquascape aquatic background basin beckfordi biotope black blackwater brazilian breeding bright brown captive careful characin colourful conditions controlled copy curious decorative design detail dim ecology endemic fauna fish fishkeeping free freshwater golden habitat hobby instinct lebiasinidae light line look low macro nannostomus native natural nature negro ornamental pencil pencilfish protection red rio south space spawn stained tank tannin underwater vulnerable water white widespread wild yellow young