[n = 24]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| unknown | USSR | UK | established | unknown |
| unknown | USA | Chile | unknown | |
| unknown | Russian Fed | Finland | probably not established | |
| unknown | Unknown | Germany | not established | |
| unknown | Can Newfounl | Greenland | established | no data |
| unknown | Newfoundland | Greenland | established | |
| unknown | Unknown | Iceland | probably established | |
| unknown | Unknown | Iran | probably established | unknown |
| unknown | Russian Fed | Israel | probably not established | unknown |
| unknown | Unknown | Latvia | probably established | |
| unknown | Unknown | Argentina | unknown | |
| 1960 - 1969 | USSR | Ireland | probably established | |
| 1958 - 1966 | British Columbia | Newfoundland | not established | none |
| 1960 - 1969 | Norway | Ireland | probably established | |
| 1960 - 1969 | USSR | Norway | probably established | |
| 1973 - 1975 | USSR | Poland | probably established | |
| 1939 | Unknown | USSR | not established | |
| 1956 | Canada (Lakelse River) | United States of America (Lake Superior) | established | unknown |
| 1956 | Skeena River, British Columbia | Goose Creek | not established | |
| 1956 | Lakelse River, British Columbia | Lake Superior, Quebec | established | unknown |
| 1956 | Lakelse River, British Columbia | Lake Superior | established | |
| 1974 | Unknown | Sweden | probably established | |
| 1985 | Japan | South Korea | unknown | |
| 1987 | Russian Fed | China | unknown | no data |