綠線鉛筆

Nannostomus marilynae — Green Line Pencilfish

The Green Line Pencilfish (Nannostomus marilynae) is a rare and beautiful species featuring a vivid iridescent green horizontal stripe along a warm brownish body, distinguishing it from other pencilfish. Native to the Rio Negro drainage in Brazil, it requires soft, acidic blackwater conditions to truly thrive and display its best coloration. Its rarity and striking appearance make it highly prized by specialist hobbyists.