Common name: Grass Carp × Bighead Carp
Identification: Similar to pure grass carp but with many features intermediate between the two parent species. Howells (1992) provided distinguishing features. Maximum size: Probably similar to grass carp, 75 -125 cm.
Native Range: None; artificial hybrid.
Hydrologic Unit Codes (HUCs) Explained
Puerto Rico &
Interactive maps: Point Distribution Maps
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 Ctenopharyngodon idella × Hypophthalmichthys nobilis are found here.
Table last updated 12/8/2023
† Populations may not be currently present.
Means of Introduction: Intentionally stocked by the Texas Parks and Wildlife Department in 1989 (Howells 1992a).
Status: Reported in Arizona and Texas. Eradicated in California.
Impact of Introduction: It failed to control hydrilla in the Salton Sea.
Fact Sheet for Ctenopharyngodon idella
- USGS Nonindigenous Aquatic Species Database
Fact Sheet for Hypophthalmichthys nobilis - USGS Nonindigenous Aquatic Species Database
Revision Date: 5/9/2019
Peer Review Date: 4/11/2006
Fuller, P., 2023, Ctenopharyngodon idella × Hypophthalmichthys nobilis: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=515, Revision Date: 5/9/2019, Peer Review Date: 4/11/2006, Access Date: 12/9/2023
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.