Invasion

Invasion Description

1st Record: Straits of Mackinac/MI/Lake Michigan (found at 6 of 37 sites sampled) (1997, Nalepa et al. 2001)

Geographic Extent

Straits of Mackinac/MI/Lake Michigan (found at 6 of 37 sites sampled) (1997, Nalepa et al. 2001); ~4 mi W of St. Ignace/MI/Lake Michigan (1997, USGS Nonindigenous Aquatic Species Program 2008); near Charles/MI/St. Martin Bay, Lake Huron (1997, USGS Nonindigenous Aquatic Species Program 2008); Gull Island Reef/MI/Lake Michigan (2000, USGS Nonindigenous Aquatic Species Program 2008); off Port Dolomite/MI/Lake Huron (2011, USGS Nonindigenous Aquatic Species Program 2012)