Nonindigenous Aquatic Species

NAS - Nonindigenous Aquatic Species

Mid-Atlantic Panel on Aquatic Invasive Species regional view of the NAS map

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Native range data for these species provided wholly or in part by NatureServe.

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Data Disclaimer: Number of records does not imply species abundance. These maps represent collection records only and may not reflect the actual distribution of established populations. Recommended browsers are Firefox, Chrome, IE9 & above. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data. Please contact NAS staff for a custom query.

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Disclaimer:

Welcome to the NAS regional map view of the Mid-Atlantic Panel on Aquatic Invasive Species (MAPAIS) states, which includes Delaware, District of Columbia, Maryland, New Jersey, New York, North Carolina, Pennsylvania, Virginia, and West Virginia (outlined by the MAPAIS-region states layer). This regional view of the NAS database is a subset of the species found in the region states and their immediate neighboring states.

The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2025]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [3/27/2025].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.