Carcinus maenas
Carcinus maenas
(green crab)
Crustaceans-Crabs
Exotic
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12 results for Carcinus maenas (green crab)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
4368 CT coastal areas1940 02030203 Long Island Soundestablished
887097 CTFairfieldOff Stratford, shallow water, from boat2008 02030203 Long Island Soundestablished
154676 CTMiddlesexEastern Long Island Sound (quantitative surveys from west to east along the northern coast of LIS)1996 02030203 Long Island Soundestablished
154675 CTNew HavenCentral Long Island Sound (quantitative surveys from west to east along the northern coast of LIS)1996 02030203 Long Island Soundestablished
4870 CTNew HavenLong Island Sound drainage1874 02030203 Long Island Soundestablished
4181 CTNew HavenLong Island Sound near New Haven, CT (just south of East Haven)1996 02030203 Long Island Soundestablished
155595 CTNew HavenLong Island Sound, Milford1997 02030203 Long Island Soundestablished
155593 CTNew HavenLong Island Sound, New Haven1997 02030203 Long Island Soundestablished
887102 CTNew HavenOuter Island1902 02030203 Long Island Soundestablished
155587 CTNew LondonLong Island Sound, Groton1997 02030203 Long Island Soundestablished
155589 CTNew LondonLong Island Sound, Niantic Harbor1997 02030203 Long Island Soundestablished
155585 CTNew LondonLong Island Sound, Stonington1997 02030203 Long Island Soundestablished

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. 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.

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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 [12/5/2025].

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