Pacifastacus leniusculus
Pacifastacus leniusculus
(Signal Crayfish)
Crustaceans-Crayfish
Native Transplant
Collection Info
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10 results for Pacifastacus leniusculus (Signal Crayfish)
Download Data

Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
619854 CAEl DoradoLake Tahoe1895 16050101 Lake Tahoeestablished
260636 CAEl DoradoLake Tahoe1916 16050101 Lake Tahoeestablished
4221 CANevadaDonner Lake1962 16050102 Truckeeestablished
4220 CANevadaIndependence Lake1962 16050102 Truckeeestablished
619852 CASacramentoDelta [general location]1959 18020163 Lower Sacramentoestablished
619855 CASacramentoDelta [general location]2005 18020163 Lower Sacramentoestablished
1710745 CASierraSagehen Creek, Upstream from Stampede Reservoir1998 16050102 Truckeeestablished
1754351 NVEurekaHumboldt River, Dunphy, Exit 254 off I-801995 16040105 Middle Humboldt 
4222 NVLyonLahontan Reservoir1962 16050202 Middle Carsonestablished
1754346 ORHarneyWarm Springs Reservoir, 40.7 mi E Burns2017 17050116 Upper Malheur 

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. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/23/2026].

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