Specimen Information

Carcinus maenas
Carcinus maenas
(green crab)
Crustaceans-Crabs
Exotic
Collection Info
Point Map
Species Profile
Animated Map

Specimen ID1872913
GroupCrustaceans-Crabs
GenusCarcinus
Speciesmaenas
Common Namegreen crab
StateCA
CountyAlameda
LocalityAngel Island-Frontal San Francisco Bay Estuaries
Mapping AccuracyAccurate
HUC8 NameSan Pablo Bay
HUC8 Number18050002
HUC10 NameSan Francisco Bay
HUC10 Number1805000210
HUC12 NameAngel Island-Frontal San Francisco Bay Estuaries
HUC12 Number180500021001
Map
Collection Day10
Collection Month2
Collection Year2025
Year AccuracyActual
Potential Pathwaydispersed | shipping ballast water
Record TypeNAS sighting report
VerifierWesley Daniel (USGS)
Freshwater/MarineMarine
Number Collected3
Photo
Carcinus maenas
Carcinus maenas
Carcinus maenas

Disclaimer:

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].

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.