Invasion
Invasion Description
1st Record: IL/Lake Michigan (1871, Mills et al. 1993)
Geographic Extent
IL/Lake Michigan (1871, Mills et al. 1993); Chicago/IL/Lake Michigan (1880, Mills et al. 1993); WI/small bay off of Green Bay (1920, University of Michigan Museum of Zoology 2013, approx. 44.85447 N, 87.49168 W); Grand Haven/MI/Grand River, Gov't Piers Bay (1934, #66661, University of Michigan Zoology Museum 2013); Escanaba/MI/Lake Michigan (1926, UMZM 37664, University of Michigan Museum of Zoology 2013); Wenona Beach/MI/Lake Huron, Saginaw Bay (1918, 7589 University of Michigan Museum of Zoology 2013); MI/Lake Huron, Saginaw Bay (1926, UMZM 36807 University of Michigan Museum of Zoology 2013); Duluth/MN/St. Louis River, Lake Superior (2006, Trebitz et al. 2010, operculae only, not established; 2011-2013, Trebitz et al. 2015, established and spreading)
Vectors
| Level | Vector |
|---|---|
| Alternate | Packing Material |
| Probable | Dry Ballast |
Regional Impacts
| Economic Impact | Health | |
| Fouling of Chicago's water systems by B. tentaculata apparently occurred as late as the 1950s, blocking water service to some homes (Ingraham 1956, cited by Keillor 1993). | ||