Hundreds of backwater streams zigzag along the west coast of Africa and eventually empty into the Zaire (Congo) River. These backwater stream environments fluctuate depending upon the rainy and dry seasons. During the dry season, these streams evaporate. During the rainy season, they swell and overflow their banks. This flooding covers the dense tropical vegetation and creates very acidic, tea colored water environment similar to some South American streams. Very unusual fish such as the freshwater flying fish (African Butterfly Fish), brightly colored Annual fish (Killiefish), and the dolphin like, sonar capable, Elephant Nose Fish are found here. Dark, reddish-brown to dark brown gravel is recommended to stimulate the natural substrate. Driftwood, pebbles and low-light plants should also be used to recreate this niche.