Year / Period | From | To | Established | Ecological effects |
---|---|---|---|---|
1874 | Western North Atlantic | Netherlands | unknown | unknown |
1936 | Northwest Atlantic. | Baltic Sea. | unknown | yes |
1937 | Western North Atlantic | San Frnacisco Bay, California | unknown | unknown |
1938 | Netherlands | Russian Federation (Black Sea and Caspian Sea) | yes | probably yes |
1938 | Netherlands | Ukraine (Black Sea) | yes | probably yes |
1994 | Atlantic, Northwest | Italy | yes | unknown |
1994 | Atlantic, Northwest | Turkey | yes | unknown |
1996 | Atlantic, Northwest | United Kingdom | yes | unknown |
1996 | North America | Cardiff Docks. | probably yes | unknown |
1996 | West Atlantic | Cardiff Docks. | probably yes | unknown |
2001 | Atlantic, Northwest | France | yes | unknown |