Invasion

Invasion Description

1st Records: WA/Southern end of Willapa Bay (10/31/09, Nishizawa et al. 2014, 46 22 31.07 N); Hammond/OR/ Trestle Bay (Jetty Lagoon), Columbia River Estuary (10/31/09, Nishizawa et al. 2014, 46°13?30.03?N, 123°59?29.70?W); Seaside/OR/Necanicum River Estuary (10/31/09, Nishizawa et al. 2014, 46°01 02.60 N, 123°55 18.70 W); Wheeler/OR/Nehalem River Estuary (10/31/09, Nishizawa et al. 2014, 45°41 15.05 N, 123°53 20.63 W); Toledo State Airport, Toledo/OR/Yaquina River Estuary (10/31/09, Nishizawa et al. 2014, 44 35 50.57 N, 123 56 15.78 W).

Juvenile worms were collected in Washington-Oregon estuaries on October 28-81, 2009, and reared in a Japanese laboratory at 18 C, until they metamorphosed into adult epitokes (Nishizawa et al. 2014).

Geographic Extent

WA/Grays Harbor (7/7/2012, Tusoji and Furota 2016, 46°58?N, 123°54?W, 1 specimen); WA/Southern end of Willapa Bay (10/31/09, Nishizawa et al. 2014, 46 22 31.07 N); Hammond/OR/ Trestle Bay (Jetty Lagoon), Columbia River Estuary (10/31/09, Nishizawa et al. 2014, 46°13?30.03?N, 123°59?29.70?W); Seaside/OR/Necanicum River Estuary (10/31/09, Nishizawa et al. 2014, 46°01 02.60 N, 123°55 18.70 W); OR/Schooner Creek, Siletz Bay (7/4/2012, Tosuji and Furota 2016, 29, H. diadroma, 10 H. limnicola); Wheeler/OR/Nehalem River Estuary (10/31/09, Nishizawa et al. 2014, 45°41 15.05 N, 123°53 20.63 W); OR/Siletz Bay y (7/4/2012, Tosuji and Furota 2016, 16, H. diadroma, 2 H. limnicola); Wheeler/OR/Nehalem River Estuary (10/31/09, Nishizawa et al. 2014, 45°41 15.05 N, 123°53 20.63 W); Toledo State Airport, Toledo/OR/Yaquina River Estuary (10/31/09, Nishizawa et al. 2014, 44 35 50.57 N, 123 56 15.78 W).; OR/Alsea Bay (7/12/2014, Tosuji and Furota 2016, 44°25?N, 124°02?W, 14 H. diadroma, 22 H. limnicola); OR/Siuslaw River (7/3/2012, Tosuji and Furota 2016, 43°59?N, 124°05 W, 14 H. diadroma, 8 H. limnicola); OR/Umpqua River (7/3/2012, Tosuji and Furota 2016, 23 H. diadroma, 3 H. limnicola); OR/South Slough Coos Bay (7/3/2012. Tosuji and Furota 2016, 43°19?N, 124°19?W, 12 H. diadroma, 25 H. limnicola)