Specimen Information

Pylodictis olivaris
Pylodictis olivaris
(Flathead Catfish)
Native Transplant

Specimen ID238842
Common NameFlathead Catfish
LocalityMiddle Columbia drainage
Mapping AccuracyCentroid
Centroid Type 
HUC8 NameMiddle Columbia-Lake Wallula
HUC8 Number17070101
Collection Year1975
Year AccuracyEstimated
Potential Pathwayhitch hiker with stocked fish
Reference 1
Ref. Number:13708
Author:Wydoski, R.S., and R.R. Whitney.
Title:Inland Fishes of Washington. Second Edition.
Publisher:American Fisheries Society, Bethesda, MD in association with University of Washington Press, Seattle.
Pages:322 pp
Comments"Flathead catfish were probably introduced into the Snake River in 1943 as a misidentified shipment of blue catfish; other species of catfishes were more than likely introduced at the same time, including the tadpoles madtom; both species were in the lower Snake and Columbia Rivers by the mid 1970s."
Record TypeLiterature
Earliest Recordstate


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Citation information: U.S. Geological Survey. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/27/2024].

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