Using Grass Carp for Vegetation Control

Online application system for Permit to Stock Triploid Grass Carp coming soon! 
Applicants may submit permit application and make payment with debit/credit card or pay by check. Target date for the triploid grass carp permit component is January 2020.  For information please email ifpermits@tpwd.texas.gov or call 512-389-4444.

The grass carp, also known as white amur, is a vegetarian fish native to the Amur River in Asia. Because this fish feeds on aquatic plants, it can be an effective biological tool for control of nuisance vegetation. The US Fish and Wildlife Service introduced grass carp into the United States in 1963 for experimental purposes. Since 1992, Texas has allowed stocking of triploid grass carp, a sterile form of the species, with a permit from the Texas Parks and Wildlife Department.

Many have asked, “Since triploid grass carp are sterile, why is a permit required?” These fish are permitted so that TPWD can keep track of the location and number of grass carp in the environment. Impoundments on permanently flowing creeks, or those that overflow frequently, should not be stocked with triploid grass carp unless they can be effectively screened. Preventing escapement helps protect beneficial aquatic vegetation in our public waters. Although triploid grass carp can’t reproduce, they can live for years, potentially migrate to sensitive areas, and consume a great deal of vegetation.

Will Grass Carp Work for You?

Stocking Guidelines

Obtaining a Permit

Preventing Escape


Download a printable version of this document.media download(PDF 286.4 KB)