Triploid grass carp are fish genitically altered so they cant reproduce. They are stocked into lakes for weed control, and grow very large.
Diploid grass carp are natural spawning fish, and live in many of our rivers. They dont seem to get as big. Triploids are protected, where diploids are considered a invasive fish. whatever they are, they fight like mad when hooked. One of the most powerful fish in the waters. The little Vermillion has alot of grass carp.