The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

Oncorhynchus clarkii behnkei
Oncorhynchus clarkii behnkei
(Snake River Finespotted Cutthroat Trout)
Native Transplant

Copyright Info
Oncorhynchus clarkii behnkei Montgomery, 1995

Common name: Snake River Finespotted Cutthroat Trout

Synonyms and Other Names: Oncorhynchus clarkii carmichaeli, Jackson Hole cutthroat trout.

Taxonomy: available through www.itis.govITIS logo

Identification: Oncorhynchus clarki behnkei can be distinguished from Yellowstone (O. c. bouvieri) and other varieties of cutthroat trout by the profuse distribution of small spots on body and dorsal, adipose, and caudal fins (Behnke 2002; Page and Burr 2011).

Native Range: Upper Snake River (and tributary streams downstream of and including Gros Ventre River) between Palisades Reservoir and Jackson Lake; Wyoming and Idaho (Behnke 2002; Page and Burr 2011).

Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Nonindigenous Occurrences:

Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Oncorhynchus clarkii behnkei are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†
CO1976200915Animas; Arkansas Headwaters; Blue; Cache La Poudre; Colorado Headwaters; North Platte; North Platte Headwaters; Rio Grande Headwaters; San Luis; South Platte; South Platte Headwaters; Upper Arkansas; Upper Dolores; Upper San Juan; Upper White
ID1982201119American Falls; Bear Lake; Big Wood; Blackfoot; Boise-Mores; C.J. Strike Reservoir; Idaho Falls; Little Salmon; Lower Henrys; Middle Bear; North Fork Payette; Palisades; Portneuf; Raft; South Fork Payette; Upper Henrys; Upper Salmon; Upper Snake-Rock; Willow
MD198119982Middle Potomac-Catoctin; Potomac
NM198219905Rio Grande-Albuquerque; Upper Canadian; Upper Pecos; Upper San Juan; Upper San Juan
WY199419941Middle North Platte-Casper

Table last updated 7/12/2024

† Populations may not be currently present.

Means of Introduction: Stocked for sport

Remarks: Finespotted cutthroat trout are derived from Yellowstone cutthroat trout (O. c. bouvieri); these two species are morphologically similar (except for spotting pattern and subtle color differences) and are presently genetically indistinguishable. Some authors consider finespotted cutthroat trout as a morphological variant of O. c. bouvieri, whereas others consider it a valid subspecies (Behnke 2002).

References: (click for full references)

Behnke, R.J. 2002. Trout and salmon of North America. The Free Press, New York, NY.

Page, L.M., and B.M. Burr. 2011. Field guide to freshwater fishes of North America north of Mexico. Peterson Field Guides series. Houghton Mifflin Harcourt, Boston, MA.

Rasmussen, J.L. 1998. Aquatic nuisance species of the Mississippi River basin. 60th Midwest Fish and Wildlife Conference, Aquatic Nuisance Species Symposium, Dec. 7, 1998, Cincinnati, OH.

Other Resources:
FishBase Summary

Author: Matt Neilson, and Pam Fuller

Revision Date: 5/30/2012

Peer Review Date: 5/30/2012

Citation Information:
Matt Neilson, and Pam Fuller, 2024, Oncorhynchus clarkii behnkei Montgomery, 1995: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=892, Revision Date: 5/30/2012, Peer Review Date: 5/30/2012, Access Date: 7/12/2024

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is 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 information.


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. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [7/12/2024].

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.