[n = 4]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| 1960 - 1969 | Zimbabwe | South Africa | established | unknown |
| 1975 | Malawi (Lake Malawi) | Swaziland | established | unknown |
| 1975 | Mozambique (Lake Malawi) | Swaziland | established | unknown |
| 1975 | Tanzania (Lake Malawi) | Swaziland | established | unknown |