Talk about goldfish taking over, in Quemado lake,NM, there were so many goldfish that one could stand up an the hill above the lake and there would be a glowing ring around the lake. The solution used by the New Mexico fisheries people was to stock muskies. I was told that these were sterile fish, at any rate, the lake is not overrun with goldfish. I guess the muskies eat a few trout but they did solve the goldfish problem which was also causing problems for the trout fisherman.