male pencilfish hide in driftwood in nature biotope aquarium, dim light with bown tannin stained blackwater

adult amazonia amazonian america animal aqua aquarium aquatic background beckfordi biotope blackwater blurred bown brazilian careful characin colourful copy decorative design detail dim driftwood ecology endemic exotic fauna fish free freshwater golden habitat hard hide instinct keep lebiasinidae light low male nannostomus natural nature negro ornamental pencil pencilfish piaba project protection red rio scape south space stained tank tannin underwater vulnerable water yellow