[n = 6]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| unknown | Rwanda | Burundi | unknown | unknown |
| unknown | Unknown | Rwanda | established | |
| 1954 | Lake Albert | Lake Victoria | established | some |
| 1954 | Lake Albert | Lake Victoria | established | some |
| 1955 | Lake Albert | Lualaba River | probably established | |
| 1955 | Lake Albert | Lake Kyoga | established |