Invasion

Invasion Description

None

Geographic Extent

Netherlands and Belgium,/along coasts of the North Sea, brackish inshore waters of the Denmark, British waters (Roginskaya 1970; Thompson and Brown 1984); Victoria Docks/London/Thames River (1869, Thompson and Brown 1984); Caen/Normandy/Canal de Caen (Naville 1926, cited by Thompson and Brown 1984)