NAS - Nonindigenous Aquatic Species


zebra mussel
Dreissena polymorpha
Exotic to United States

Species Observations

Point Observations
Drainage Observations

Reference Layers


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    This map shows 0 specimen records at 0 unique sites.

    centroid established  Established - Accurate
    centroid collected  Collected - Accurate
    centroid failed  Failed - Accurate
    centroid unknown  Unknown - Accurate

    centroid established  Established - Centroid
    centroid collected  Collected - Centroid
    centroid failed  Failed - Centroid
    centroid unknown  Unknown - Centroid

    centroid established  Established - Approximate
    centroid collected  Collected - Approximate
    centroid failed  Failed - Approximate
    centroid unknown  Unknown - Approximate
    Records reported at this level of accuracy.
    Records only reported at state level.
    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. Data are not available for download from the web site. Please contact NAS staff for a custom query.

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    Page Contact Information: Pam Fuller - NAS Program (
    Page Last Modified: Thursday, November 05, 2015


    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. [2015]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [11/26/2015].

    Additional information for authors