›
pondNorthern snakeheadestablished
Documented northern snakehead water in Somerset County, Maryland. Tangier drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 25 USGS specimen records (2007–2009); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2007); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Talbot County, Maryland. Choptank drainage. 1 USGS specimen record (2018); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
bayGiant snakeheaderadicated
Documented giant snakehead water in Anne Arundel County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2002); status: failed. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 1 USGS specimen record (2018); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Wicomico County, Maryland. Tangier drainage. 5 USGS specimen records (2007–2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Cecil County, Maryland. Chester-Sassafras drainage. 21 USGS specimen records (2023); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 5 USGS specimen records (2017–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Sprawling tidal marsh refuge on the Eastern Shore — a snakehead and bowfishing destination.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Dorchester County, Maryland. Tangier drainage. 11 USGS specimen records (2012–2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadreported
Documented northern snakehead water in Cecil County, Maryland. Chester-Sassafras drainage. 2 USGS specimen records (2023); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 12 USGS specimen records (2008–2016); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Harford County, Maryland. Gunpowder-Patapsco drainage. 13 USGS specimen records (2018–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Dorchester County, Maryland. Tangier drainage. 3 USGS specimen records (2018–2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Harford County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2026); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
›
canalNorthern snakeheadestablished
Documented northern snakehead water in Montgomery County, Maryland. Middle Potomac-Catoctin drainage. 3 USGS specimen records (2015); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Montgomery County, Maryland. Middle Potomac-Catoctin drainage. 5 USGS specimen records (2007); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Cecil County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2017); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Patuxent drainage. 1 USGS specimen record (2018); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 1 USGS specimen record (2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
bayNorthern snakeheadestablished
Documented northern snakehead water in Cecil County, Maryland. Chester-Sassafras drainage. 19 USGS specimen records (2010–2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Queen Anne's County, Maryland. Chester-Sassafras drainage. 4 USGS specimen records (2019–2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Dorchester County, Maryland. Tangier drainage. 7 USGS specimen records (2019–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Dorchester County, Maryland. Tangier drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Lower Potomac drainage. 49 USGS specimen records (2008–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadreported
Upper Choptank tidal creeks increasingly turning up snakehead.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Dorchester County, Maryland. Choptank drainage. 1 USGS specimen record (2015); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Calvert County, Maryland. Patuxent drainage. 1 USGS specimen record (2014); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadreported
Documented northern snakehead water in Queen Anne's County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2020); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Harford County, Maryland. Lower Susquehanna drainage. 4 USGS specimen records (2019–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
pondNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Patuxent drainage. 1 USGS specimen record (2018); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Harford County, Maryland. Gunpowder-Patapsco drainage. 3 USGS specimen records (2015–2018); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 29 USGS specimen records (2020–2023); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Cecil County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2019); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadreported
Documented northern snakehead water in Cecil County, Maryland. Chester-Sassafras drainage. 6 USGS specimen records (2020–2023); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Kent County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2017); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Calvert County, Maryland. Severn drainage. 1 USGS specimen record (2011); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Harford County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
bayNorthern snakeheadreported
Documented northern snakehead water in Cecil County, Maryland. Chester-Sassafras drainage. 6 USGS specimen records (2023); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Gunpowder-Patapsco drainage. 3 USGS specimen records (2013–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
bayNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2008); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Calvert County, Maryland. Severn drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Harford County, Maryland. Gunpowder-Patapsco drainage. 2 USGS specimen records (2018–2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Queen Anne's County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Harford County, Maryland. Gunpowder-Patapsco drainage. 118 USGS specimen records (2018–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Lower Potomac drainage. 1 USGS specimen record (2009); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2018); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Dorchester County, Maryland. Tangier drainage. 2 USGS specimen records (2018–2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 2 USGS specimen records (2009); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Prince Georges County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2018); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Lower Potomac drainage. 20 USGS specimen records (2011–2012); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
bayNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2024); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
bayNorthern snakeheadreported
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2021); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 1 USGS specimen record (2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
pondNorthern snakeheaderadicated
Documented northern snakehead water in Montgomery County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2015); status: failed. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in Howard County, Maryland. Patuxent drainage. 1 USGS specimen record (2016); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in Howard County, Maryland. Patuxent drainage. 1 USGS specimen record (2006); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadreported
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 1 USGS specimen record (2023); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Lower Potomac drainage. 1 USGS specimen record (2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Dorchester County, Maryland. Tangier drainage. 4 USGS specimen records (2018); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Dorchester County, Maryland. Tangier drainage. 13 USGS specimen records (2018–2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadreported
Documented northern snakehead water in Dorchester County, Maryland. Choptank drainage. 1 USGS specimen record (2012); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Cecil County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2023); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2008); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Patuxent drainage. 5 USGS specimen records (2015–2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Patuxent drainage. 10 USGS specimen records (2019–2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Montgomery County, Maryland. Middle Potomac-Catoctin drainage. 4 USGS specimen records (2019–2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in Montgomery County, Maryland. Middle Potomac-Catoctin drainage. 5 USGS specimen records (2018–2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Queen Anne's County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 2 USGS specimen records (2017–2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
bayNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Lower Potomac drainage. 2 USGS specimen records (2018); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Somerset County, Maryland. Tangier drainage. 1 USGS specimen record (2017); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Anne Arundel County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2020); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Caroline County, Maryland. Nanticoke drainage. 1 USGS specimen record (2015); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
A legendary Potomac tributary; spatterdock fields and pads are stuffed with snakehead in summer.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Calvert County, Maryland. Patuxent drainage. 1 USGS specimen record (2011); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 2 USGS specimen records (2019–2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Kent County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2017); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2019); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Somerset County, Maryland. Tangier drainage. 1 USGS specimen record (2012); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadreported
Documented northern snakehead water in Frederick County, Maryland. Monocacy drainage. 1 USGS specimen record (2016); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Lower Potomac drainage. 1 USGS specimen record (2013); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
pondNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Lower Potomac drainage. 1 USGS specimen record (2009); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Quiet lower-Potomac creek with marsh edges and drains that hold snakehead.
›
riverNorthern snakeheadestablished
Eastern Shore tidal river with a strong and growing snakehead population.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 2 USGS specimen records (2018–2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Cecil County, Maryland. Chester-Sassafras drainage. 2 USGS specimen records (2015–2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Talbot County, Maryland. Choptank drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
pondNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadreported
Documented northern snakehead water in Wicomico County, Maryland. Tangier drainage. 1 USGS specimen record (2026); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2005); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadreported
Documented northern snakehead water in Cecil County, Maryland. Chester-Sassafras drainage. 17 USGS specimen records (2023); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Talbot County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Cecil County, Maryland. Lower Susquehanna drainage. 1 USGS specimen record (2021); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Cecil County, Maryland. Lower Susquehanna drainage. 1 USGS specimen record (2016); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadreported
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 2 USGS specimen records (2023); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Harford County, Maryland. Gunpowder-Patapsco drainage. 2 USGS specimen records (2023); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2006); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Gunpowder-Patapsco drainage. 9 USGS specimen records (2014–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Patuxent drainage. 30 USGS specimen records (2012–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Talbot County, Maryland. Choptank drainage. 1 USGS specimen record (2021); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheaderadicated
Documented northern snakehead water in Montgomery County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2004); status: eradicated. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadreported
Documented northern snakehead water in Anne Arundel County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2021); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Close-to-DC Potomac creek with spatterdock and good shore access at Piscataway Park.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Dorchester County, Maryland. Tangier drainage. 1 USGS specimen record (2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Dark, cypress-lined Eastern Shore river with snakehead throughout.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 84 USGS specimen records (2004–2014); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Lower Potomac drainage. 1 USGS specimen record (2013); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Lower Potomac drainage. 3 USGS specimen records (2009–2010); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 105 USGS specimen records (2004–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2011); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 16 USGS specimen records (2007); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 2 USGS specimen records (2007); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
pondNorthern snakeheadestablished
Documented northern snakehead water in Talbot County, Maryland. Choptank drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Middle Potomac-Anacostia-Occoquan drainage. 1 USGS specimen record (2008); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
pondNorthern snakeheadestablished
Documented northern snakehead water in Carroll County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Wicomico County, Maryland. Nanticoke drainage. 1 USGS specimen record (2017); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 1 USGS specimen record (2011); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
lakeNorthern snakeheadestablished
Documented northern snakehead water in St. Marys County, Maryland. Lower Potomac drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
pondNorthern snakeheadestablished
Documented northern snakehead water in Wicomico County, Maryland. Tangier drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 5 USGS specimen records (2017–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
riverNorthern snakeheadestablished
Documented northern snakehead water in Kent County, Maryland. Chester-Sassafras drainage. 18 USGS specimen records (2019–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
›
creekNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 3 USGS specimen records (2019–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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riverNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 3 USGS specimen records (2018–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Harford County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 1 USGS specimen record (2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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riverNorthern snakeheadestablished
Documented northern snakehead water in Wicomico County, Maryland. Tangier drainage. 1 USGS specimen record (2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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riverNorthern snakeheadreported
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 1 USGS specimen record (2016); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
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riverNorthern snakeheadestablished
Documented northern snakehead water in St. Marys County, Maryland. Lower Potomac drainage. 1 USGS specimen record (2010); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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pondNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Kent County, Maryland. Chester-Sassafras drainage. 2 USGS specimen records (2017–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Kent County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Baltimore County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2015); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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riverNorthern snakeheadestablished
Documented northern snakehead water in Harford County, Maryland. Lower Susquehanna drainage. 17 USGS specimen records (2015–2024); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Harford County, Maryland. Gunpowder-Patapsco drainage. 47 USGS specimen records (2006–2023); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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riverGiant snakeheaderadicated
Documented giant snakehead water in Prince George's County, Maryland. Patuxent drainage. 1 USGS specimen record (2000); status: failed. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Harford County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2020); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadreported
Documented northern snakehead water in Harford County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2018); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
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riverNorthern snakeheadestablished
Documented northern snakehead water in Kent County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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riverNorthern snakeheadestablished
Dorchester County marsh river popular with bowfishers for snakehead.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Queen Anne's County, Maryland. Choptank drainage. 1 USGS specimen record (2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadreported
Documented northern snakehead water in Kent County, Maryland. Chester-Sassafras drainage. 53 USGS specimen records (2023); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
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bayNorthern snakeheadreported
Documented northern snakehead water in Harford County, Maryland. Upper Chesapeake Bay drainage. 4 USGS specimen records (2023); status: reported. Location verified from the USGS Nonindigenous Aquatic Species database.
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bayNorthern snakeheadestablished
Documented northern snakehead water in Charles County, Maryland. Lower Potomac drainage. 1 USGS specimen record (2008); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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pondNorthern snakeheaderadicated
Documented northern snakehead water in Anne Arundel County, Maryland. Patuxent drainage. 10 USGS specimen records (2002); status: eradicated. Location verified from the USGS Nonindigenous Aquatic Species database.
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bayNorthern snakeheadestablished
Documented northern snakehead water in Anne Arundel County, Maryland. Gunpowder-Patapsco drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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pondNorthern snakeheadreported
Documented northern snakehead water in Anne Arundel County, Maryland. Severn drainage. 1 USGS specimen record (2021); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
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riverNorthern snakeheadestablished
Documented northern snakehead water in Prince George's County, Maryland. Patuxent drainage. 7 USGS specimen records (2012–2014); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Wicomico County, Maryland. Nanticoke drainage. 3 USGS specimen records (2019–2021); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Montgomery County, Maryland. Middle Potomac-Catoctin drainage. 1 USGS specimen record (2007); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadreported
Documented northern snakehead water in Somerset County, Maryland. Tangier drainage. 1 USGS specimen record (2019); status: unknown. Location verified from the USGS Nonindigenous Aquatic Species database.
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riverNorthern snakeheadestablished
Salisbury-area tidal river holding snakehead in its creeks and guts.
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riverNorthern snakeheadestablished
Documented northern snakehead water in Queen Anne's County, Maryland. Chester-Sassafras drainage. 2 USGS specimen records (2019–2022); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
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creekNorthern snakeheadestablished
Documented northern snakehead water in Queen Anne's County, Maryland. Chester-Sassafras drainage. 1 USGS specimen record (2019); status: established. Location verified from the USGS Nonindigenous Aquatic Species database.
