Gambusia affinis

Western Mosquitofish

Collection Information for Gambusia affinis

Results limited to All Great Lakes Drainages.
To see the collection list for the entire United States, click here.
 Results also available in (click to export table to spreadsheet)

(click table headers to sort)
Specimen IDStateCountyLocalityYearHUC NumberDrainage NameStatus
1702231WIOzaukeeLake Michigan200004190000Lake Michigan 
1715801OHSanduskySandusky River, backwater area approx. 2 miles downstream of I-90/Ohio Turnpike202304100011Sandusky 
262129  Lake Michigan192304190000Lake Michigancollected
35481MIMonroeMonroe County, SE corner198004260000Lake Erieestablished
39919OHLucasOak Openings near Toledo198104100009Lower Maumeeestablished
40076OHLucasMaumee River near Lake Erie198004100009Lower Maumeeestablished
748105OHCuyahogaRocky River200904110001Black-Rockyestablished
40049OHLucasOak Openings near Toledo194704100009Lower Maumeeestablished
859935MIOaklandMinnow Pond Creek west of Farmington Road, Rouge River trib.201304090004Detroitunknown
1758094OHOttawa[No locality description provided]202404100010Cedar-Portage 
1758095OHWood[No locality description provided]202404100010Cedar-Portage 
1758096OHWood[No locality description provided]202404100010Cedar-Portage 
1758097OHWood[No locality description provided]202404100010Cedar-Portage 
1892697MIAllegan[No locality description provided]202504050002Black-Macatawa 
1892698MIAllegan[No locality description provided]202504050002Black-Macatawa 
1920393OHLucasLake Erie, at Maumee Bay, OH/MI202404100009Lower Maumee 
1920415OHWoodLake Erie, at Maumee Bay, OH/MI202404100009Lower Maumee 
1920848OHSanduskyLake Erie, at Sandusky Bay, OH202404100011Sandusky 
1920852OHSanduskyLake Erie, at Sandusky Bay, OH202404100011Sandusky 
1920862OHSanduskyLake Erie, at Sandusky Bay, OH202404100011Sandusky 
1923562OHLucasLake Erie, at Maumee Bay, OH/MI202504100009Lower Maumee 
1923944OHSanduskyLake Erie, at Sandusky Bay, OH202504100011Sandusky 
1923969OHSanduskyLake Erie, at Sandusky Bay, OH202504100011Sandusky 

Citation for this information:
U.S. Geological Survey, 2026, Gambusia affinis: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 4/16/2026