Invasion
Invasion Description
1st Record: Portland/OR/Willamette River (1931, USNM 42720, US National Museum of Natural History 2011, Schmitt 1939). It has been collected in ponds and lakes in the Columbia River watershed (USGS Nonindigenous Species Program 2011), but we know of no further records in the estuary.
Geographic Extent
Portland/OR/Willamette River (1931, USNM 42720, US National Museum of Natural History 2011, Schmitt 1939)
Vectors
| Level | Vector |
|---|---|
| Alternate | Fisheries Accidental (not Oyster) |
| Alternate | Aquatic Plant Shipments |
| Alternate | Ballast Water |
Regional Impacts
References
Schmitt, Waldo L. (1939) Freshwater jellyfish records since 1932., The American Naturalist 73: 83-892002-2021 Invertebrate Zoology Collections Database. <missing description>