adult pencilfish in nature biotope aquarium, brazilian ornamental blackwater fish from rio negro, blurred background

adult amazon america animal aqua aquarium aquatic attentive background beckfordi behaviour biotope black blackwater blurred brazil brazilian captive careful colourful commercial conditions controlled curious decorative design detail dwarf ecology endemic exotic fauna fish fishkeeping free freshwater glow green habitat hard healthy hobby ichthyology image instastory instinct keep nannostomus natural nature negro neon ornamental pencilfish pet protection red rio south space stripe tank trade underwater water wild yellow young