|
unknown |
Romania |
Varna Lake |
|
|
|
1967 - 1977 |
unknown |
New South Wales |
unknown |
|
|
2006 - 2011 |
unknown |
Argentina |
|
|
|
1954 |
unknown |
United States of America |
yes |
probably yes |
|
1957 |
Western North Pacific |
San Francisco Bay, California |
unknown |
unknown |
|
1998 |
UK |
Gent-Terneuzen Canal |
|
|
|
2000 |
Unspecified, China. |
Orwell Estuary, southern North Sea. |
probably yes |
unknown |
|
2000 |
Unspecified, Japan. |
Orwell Estuary, southern North Sea |
probably yes |
unknown |
|
2000 |
Unspecified, Korea. |
Orwell Estuary, southern North Sea. |
probably yes |
unknown |
|
2002 |
unknown |
Constanta Harbour |
|
|
|
2004 |
Southeast Asia. |
North Sea. |
unknown |
unknown |
|
2006 |
unknown |
Gironde and Adour Estuary |
probably yes |
yes |