| Year / Period | From | To | Established | Ecological effects |
|---|---|---|---|---|
| unknown | unknown | Canada | unknown | unknown |
| 1949 - 1959 | Netherlands | United States of America | yes | probably yes |
| 1957 - 1959 | United Kingdom | Canada (New Brunswick) | unknown | unknown |
| 1970 - 1979 | USA (Washington State) | France | yes | yes |
| 1949 | East Atlantic | East coast of North America | yes | unknown |
| 1952 | France | Japan | probably yes | unknown |
| 1975 | Japan and USA | Tonga | probably no | unknown |
| 1977 | Japan | Fiji | probably no | unknown |
| 1990 | unknown | Namibia | unknown | unknown |