Pacifastacus leniusculus
Pacifastacus leniusculus
(Signal Crayfish)
Crustaceans-Crayfish
Native Transplant
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40 results for Pacifastacus leniusculus (Signal Crayfish)
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Page:12
Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
4429 CA state non-specific1989 18000000 California Regioncollected
4433 CA state non-specific1989 18000000 California Regioncollected
1474347 CAButteShady Rest Area, CA-Hwy 702018 18020121 North Fork Featherunknown
1754353 CAEl DoradoGreenwood Creek, 8.6 mi SE Auburn, Hwy. 491997 18020129 South Fork American 
619854 CAEl DoradoLake Tahoe1895 16050101 Lake Tahoeestablished
260636 CAEl DoradoLake Tahoe1916 16050101 Lake Tahoeestablished
1754355 CAEl DoradoSouth Fork American River, 0.5 mi NE Lotus, off Hwy. 491997 18020129 South Fork American 
1695171 CAFresnoBig Creek, Sierra National Forest2019 18030010 Upper Kingestablished
1697424 CAMarinFound at a series of natural cascades 3 to 7 meters high at Fern Creek, 900 meters from the confluence with Redwood Creek in the Muir Woods National Monument1997 18050005 Tomales-Drake Bays 
1754354 CAMarinOlema Creek, 7.5 mi NW Bolinas, S.R. 11997 18050005 Tomales-Drake Bays 
1697423 CAMarinRedwood Creek in Muir Woods National Monument1954 18050005 Tomales-Drake Bays 
1754358 CAMendocinoRussian River, 5 mi N Cloverdale, along Rt. 1011989 18010110 Russian 
1754357 CAModocPit River, 5 mi SW Canby1989 18020002 Upper Pit 
619851 CAMontereyMonterey County1959 18060005 Salinasestablished
4754 CAMontereyMonterey County1959 18060000 Central California Coastalestablished
4221 CANevadaDonner Lake1962 16050102 Truckeeestablished
4220 CANevadaIndependence Lake1962 16050102 Truckeeestablished
619857 CANevadaNevada County1950 18020126 Upper Bearestablished
4752 CANevadapond on the Shebley Ranch between Colfax and Grass Valley, CA1912 18020126 Upper Bearestablished
619852 CASacramentoDelta [general location]1959 18020163 Lower Sacramentoestablished
619855 CASacramentoDelta [general location]2005 18020163 Lower Sacramentoestablished
619849 CASan FranciscoSan Francisco Bay1959 18050002 San Pablo Bayestablished
619856 CASan FranciscoSan Francisco County1898 18050002 San Pablo Bayestablished
1754350 CASan Luis ObispoNacimiento River, river mile9.4, Twin Bridges, Boyscout Rd., S jct. Bivouac Rd., Camp Roberts1994 18060005 Salinas 
4751 CASanta CruzSan Lorenzo River, Santa Cruz1912 18060015 Monterey Bayestablished
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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 [12/15/2025].

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