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.

Pimephales tenellus
Pimephales tenellus
(Slim Minnow)
Native Transplant

Copyright Info
Pimephales tenellus (Girard, 1856)

Common name: Slim Minnow

Taxonomy: available through www.itis.govITIS logo

Identification: Robison and Buchanan (1988); Page and Burr (1991); Pflieger (1997). A name used in some of the earlier literature is Ceratichthys tenellus (e.g., Hubbs and Black 1947). Two subspecies are recognized, the western Slim Minnow Pimephales tenellus tenellus and the eastern Slim Minnow Pimephales tenellus parviceps (Page and Burr 1991; Pflieger 1997; Gilbert 1998).

Size: 7 cm.

Native Range: Southern Missouri, eastern Kansas, Arkansas, and northeastern Oklahoma (Page and Burr 1991). Restricted to the Ozarkian areas of the above named states, in Red and Arkansas river drainages and independent tributaries of Mississippi River (Lee et al. 1980 et seq.).

Native range data for this species provided in part by NatureServe NS logo
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 Pimephales tenellus are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†
KS194719471Lower Marais Des Cygnes

Table last updated 2/27/2023

† Populations may not be currently present.

Means of Introduction: Unknown, possible bait bucket release or stock contaminant.

Status: Reported from Kansas.

Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.

Remarks: Hubbs and Black (1947) noted the taking of a single specimen of "Ceratichthys perspicuus" from a pond in the Osage River system in Kansas. In addition, they reported the finding of at least one specimen of "Ceratichthys tenellus" from the same station and stated that it also doubtless represented an introduction from the Neosho River system. In their account for "Ceratichthys perspicuus," Hubbs and Black (1947) identified the station as Jones Pond, Coffee County. That water body was apparently an artificial impoundment, probably a farm pond. In reference to the single record of Hubbs and Black (1947), Cross (1967) stated that he had never obtained Pimephales tenellus from the Osage drainage.

Other Resources:
FishBase Summary

Author: Nico, L.

Revision Date: 5/23/2019

Peer Review Date: 12/5/2003

Citation Information:
Nico, L., 2023, Pimephales tenellus (Girard, 1856): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=622, Revision Date: 5/23/2019, Peer Review Date: 12/5/2003, Access Date: 3/29/2023

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. [2023]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [3/29/2023].

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