Apistogramma nijsseni — Seriously Fish | 水產百科網

Inhabitsslow-movingblackwaterstreams,creeksandtributaries,aswellassmallerrivers.Thewaterthesecontainistypicallystaineddarkbrownwithhumicacids ...

Order: Perciformes Family: Cichlidae[1][2]

Known only from tributaries of the Río Ucayali in Loreto Region, northern Peru including the Río Carahuayte and Río Yavarí.

Inhabits slow-moving blackwater[3] streams, creeks and tributaries, as well as smaller rivers. The water these contain is typically stained dark brown with humic acids and other chemicals released by decaying organic[4] material. This results in a negligible dissolved mineral content, and the pH can drop as low as 4.0 or 5.0. The dense rainforest canopy above means that very little light penetrates the water surface, and the substrate[5] is normally littered with fallen tree branches and a deep layer of rotting leaves.

Male: 8.5 cm Female: 7 cm[6][7]

Base[8] dimensions ...