Invasion

Invasion Description

Type locality- Scotland/Firth of Forth (1859, Calder 1988)

Geographic Extent

Scotland/Firth of Forth (1859, Calder 1988); Netherlands/North Sea (http://home.hetnet.nl/~faassema/native%20Hydrozoa.html); Netherlands/Oosterschelde estuary (2001, Wijsman and A.C. Smaal 2006)