Specimen Information

Pacifastacus leniusculus
Pacifastacus leniusculus
(Signal Crayfish)
Crustaceans-Crayfish
Native Transplant
Collection Info
Point Map
Species Profile
Animated Map

Specimen ID1695171
GroupCrustaceans-Crayfish
GenusPacifastacus
Speciesleniusculus
Common NameSignal Crayfish
StateCA
CountyFresno
LocalityBig Creek, Sierra National Forest
Mapping AccuracyAccurate
HUC8 NameUpper King
HUC8 Number18030010
HUC10 NamePine Flat Reservoir-Kings River
HUC10 Number1803001008
HUC12 NameUpper Big Creek
HUC12 Number180300100801
Map
Collection Day22
Collection Month4
Collection Year2019
Year AccuracyActual
Potential Pathwaydispersed | released aquarium
Statusestablished
Commentscaptured many during electrofishing sampling in April 2019 and have continued to periodically see signal crayfish in the same stream reach during other sampling activities ever since.
Record TypeNAS sighting report
VerifierWesley Daniel (USGS)
Freshwater/MarineFreshwater
Number Collected100
Photo
Pacifastacus leniusculus

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 [12/16/2025].

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.