Rotenone is the "reset button" for fisheries, but what is it and how does IDFG use it?

Unwanted fish species have shown up where they don’t belong in some of our state’s waters. Despite it being illegal for people to move live fish without a permit from Fish and Game, unwanted fish — both game and nongame fish — show up where they don’t belong and often degrade existing fish populations. And Fish and Game isn’t faultless, either. Decades ago, the agency stocked fish that harmed native fish populations, and it is working to fix those situations. Whether legally or illegally introduced, unwanted nonnative fish can harm native fish and established sport fisheries, which reduces fishing opportunities.