| English name | Scientific name | Introduction date | Current status |
|---|---|---|---|
| Black lampeye | Aplocheilichthys antinorii (Vinciguerra, 1883) | Last reported in 1962 | Endemic: Probably extinct by M. salmoides predation |
| Straight fin barb | Enteromius paludinosus (Peters,1852), Synonym Barbus paludinosus | Came through in-flowing rivers recorded since 1982 | Currently occasionally caught |
| Guppy | Poecilia reticulata (Peters, 1859) | Date unknown | Recorded since 1982 Currently occasionally caught |
| Black bass | Micropterus salmoides (Lacépède, 1802) | 1929 as sport fishery, re-introduced in 1946/1951 | Found today |
| Sabaki tilapia | Oreochromis spirulus niger (Günther, 1894) | 1925 | Last caught1971 |
| Redbelly | Coptodon zillii (Gervais, 1884) previous known as Tilapia zillii | 1959 | Found today |
| Blue-spotted tilapia | Oreochromis leucostictus (Trewevas, 1933) | 1959 unintentionally with T. zillii | Found today |
| Blue-spotted tilapia/ Sabaki tilapia | O. leucostictus x O.s. niger hybrid | Plentiful in 1960s | Last caught in 1972: lost due back crossing with O. leucostictus |
| Nile tilapia | Oreochromis niloticus L. | 1967. Vanished by 1971, probably due to young predation by bass. | Re-introduced in 2011. Currently present |
| Mosquito fish | Gambusia sp. | Date unknown | Absent since 1977 |
| Rainbow trout | Oncorhyncus mykiss (Walbaum, 1792) | Date unknown. Came through River Malewa from fish farms | Occasionally caught |
| Common carp | Cyprinus carpio L., sub species mirror carp C. carpio specularis and leather carp, C. carpio coiaceus | Recorded in 2001. Accidental introduction through inflowing rivers from fish farms | Found today |
| African catfish | Clarias gariepinus (Burchell, 1822) | Accidental introduction: escaped from fish farms into inflow rivers. | First recorded in 2012. Currently present |
| Louisiana crayfish | Procambarus clarkii (Girard, 1852) | Introduced in 1950s. to provide food for Bass | Currently present |