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.

Morone chrysops × mississippiensis
Morone chrysops × mississippiensis
(White Bass × Yellow Bass)
Native Hybrid

Copyright Info
Morone chrysops × mississippiensis

Common name: White Bass × Yellow Bass

Identification: Hybrid.

Size: 1.04 kg

Native Range: None; artificial hybrid.

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 Morone chrysops × mississippiensis are found here.

StateFirst ObservedLast ObservedTotal HUCs with observations†HUCs with observations†
OR199619961Summer Lake
TX198819977Caddo Lake; East Fork Trinity; Lake O'the Pines; Richland; Sabine; Toledo Bend Reservoir; Upper Sabine
WI195519751Middle Rock

Table last updated 6/15/2024

† Populations may not be currently present.

Means of Introduction: Intentionally stocked as a sport fish in Louisiana and Oklahoma. Natural hybridization in Texas.

Status: Maintained by stocking in Louisiana and Oklahoma. Established in Texas.

Impact of Introduction: These hybrids represent a threat to the genetic integrity of the parental species because of potential backcrossing (Fries and Harvey 1989).

References: (click for full references)

Burr, B. - Southern Illinois University at Carbondale, IL. 1995.

Fries, L.T., and W.D. Harvey. 1989. Natural hybridization of white bass with yellow bass in Texas. Transactions American Fisheries Soceity 118(1):87-89.

International Game Fish Association. 1994. World record game fishes. International Game Fish Association, Pompano Beach, FL.

Page, L. M., and B. M. Burr. 1991. A field guide to freshwater fishes of North America north of Mexico. The Peterson Field Guide Series, volume 42. Houghton Mifflin Company, Boston, MA.

Texas Parks and Wildlife Department. 1993. Waterbody records listing.Texas Parks and Wildlife News, May 14, 1993. 15 pp.

Texas Parks and Wildlife Department. 2001. Fish Records: Water Body - All Tackle. Texas Parks and Wildlife Department. April 24, 2001

Other Resources:
Fact Sheet for Morone chrysops - USGS Nonindigenous Aquatic Species Database

Fact Sheet for Morone mississippiensis - USGS Nonindigenous Aquatic Species Database

Author: Fuller, P.

Revision Date: 5/9/2019

Peer Review Date: 9/16/2011

Citation Information:
Fuller, P., 2024, Morone chrysops × mississippiensis: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=780, Revision Date: 5/9/2019, Peer Review Date: 9/16/2011, Access Date: 6/15/2024

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 [6/15/2024].

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