Year / Period | From | To | Established | Ecological effects |
---|---|---|---|---|
unknown | Not specified | Ireland | yes | |
1940 - 1945 | Australia | Chichester Harbour. | yes | unknown |
1940 - 1945 | New Zealand | Chichester Harbour. | yes | unknown |
1940 | Australia, New Zealand | United Kingdom | yes | unknown |
1953 | Southern Pacific. | North Sea. | unknown | yes |
1957 | Southern Pacific | Brackish and marine waters of Ireland | yes | yes |