The most common species of fishes which lived in rivers and appear in dams connected with rivers are:

1)  Tilapia speciesBream
2)  Barbus speciesYellow fish
3)  Barbel speciesCatfish
4)  MormyridsBottlenose
5)  LabeoFresh Water Salmon
6)  Seranochromis NiloticaBream

Species of minor importance also exist, but these, and those mentioned above are not distributed in all rivers, therefore, the initial composition of the fish population may vary from dam to dam.