Invasion
Invasion Description
1st Record: Honshu/Japan/Tokyo Bay (1984-1997, Sato-Okoshi 1999); Fukuyama Port/Japan/Seto Inland Sea (Sato-Okoshi 2000)
Geographic Extent
Honshu/Japan/Tokyo Bay (1984-1997, Sato-Okoshi 1999; Abe et al., 2019, variety of haibitats including Crassostra gigas shells and tunic of Molgula manhattensis); Fukuyama Port/Japan/Seto Inland Sea (1984-1997, Sato-Okoshi 2000); Fukuyama, Honshu/Japan/Fukuyama Harbor, Seto Inland Sea (Yamada et al. 2001; Takata 2011)
Vectors
| Level | Vector |
|---|---|
| Alternate | Ballast Water |
| Alternate | Hull Fouling |
Regional Impacts
| Ecological Impact | Competition | |
| Adult Polydora cornuta were a dominant benthic organism, while larvae were a major component of the plankton, though abundance decreased below 20% O2 saturation (Yamada et al. 2001). | ||