pencilfish show natural behaviour, swim in biotope aquarium, neon glowing colors in low light with brown tannin stained acid water

adult amazonia america animal aqua aquaculture aquascape beckfordi beginner brazil business careful characin closeup colourful conditions controlled copy curious demanding detail dof ecology ecosystem endemic exotic farming fauna fish fishery fishkeeping free freshwater golden habitat hobby ichthyology instinct lebiasinidae low macro nannostomus nano nature pencil piaba planted project red relax sensitive shallow slender south space stripe tank tropical understanding underwater vulnerable wildlife