| Year / Period | From | To | Established | Ecological effects |
|---|---|---|---|---|
| 1940 - 1949 | United Kingdom | Germany | yes | yes |
| 1869 - 1940 | New York | Washington State | ||
| 1970 - 1979 | France, Ireland | Spain | yes | yes |
| 1880 - 1889 | Northwest Atlantic | United Kingdom | yes | yes |
| 1872 | North America | United Kingdom | yes | unknown |
| 1890 | North America including Mexico. | Essex. | yes | yes |
| 1902 | Northwest Atlantic | Brackish and marine water areas of Ireland | no | unknown |
| 1902 | United Kingdom | Ireland | yes | yes |
| 1911 | United Kingdom | Belgium | yes | yes |
| 1926 | United Kingdom | Netherlands | yes | yes |
| 1932 | United Kingdom | Denmark | yes | yes |
| 1934 | Western Atlantic. | North Sea. | unknown | unknown |
| 1949 | United Kingdom | France | yes | yes |
| 1950 | United Kingdom | Sweden | yes | yes |
| 1957 | American Atlantic | France | probably yes | unknown |
| 1958 | United States of America | Norway | yes | yes |
| 1963 | United Kingdom | Norway | yes | yes |
| 1968 | unknown | Japan | yes | yes |
| 1973 | unknown | Malta | yes | yes |
| 1981 | American Atlantic | Malta | probably yes | unknown |
| 1982 | American Atlantic | Italy | probably yes | unknown |
| 1994 | American Atlantic | Greece | probably yes | unknown |