The grass carp, also known as white amur, is a non-native fish that is established in parts of North America.
The species is considered to be extremely effective as a biological control of aquatic plants. A single grass carp can eat 100% of its body weight in vegetation each day.
Even heavy infestations can be brought under control by this plant eater, although greater quantities of grass carp may be required per acre.
Grass carp are one of the four major Chinese aquaculture carps, which also includes silver carp, bighead carp, and black carp. In the USA, the four species are known collectively as “invasive carp.”