| Year / Period | From | To | Established | Ecological effects |
|---|---|---|---|---|
| 1600 - 1699 | United States of America | United Kingdom | yes | unknown |
| 1000 | United States of America | Norway | yes | |
| 1200 | Northwest Atlantic. | Baltic Sea. | unknown | probably yes |
| 1200 | Canada | Netherlands | yes | |
| 1500 | USA | Scandinavia. | unknown | unknown |
| 1600 | North America including Mexico. | England. | yes | unknown |
| 1966 | North Atlantic | Bulgaria (Black Sea) | yes | probably yes |
| 1966 | North Atlantic | Georgia (Black Sea) | yes | probably yes |
| 1966 | North Atlantic | Romania (Black Sea) | yes | probably yes |
| 1966 | North Atlantic | Russian Federation (Black Sea) | yes | probably yes |
| 1966 | North Atlantic | Turkey (Black Sea) | yes | probably yes |
| 1966 | North Atlantic | Ukraine (Black Sea) | yes | probably yes |
| 1976 | American Atlantic | France | yes | unknown |
| 1987 | American Atlantic | Italy | yes | unknown |
| 2002 | American Atlantic | Greece | yes | unknown |