I Live in No. Vrginia. My father in law's pond (1.5 acres) was chock a block with greenies... I never caught any other kind of fish. I bought ten 10" tiger muskies from Minnesota Muskie Farm(a cross between Pike+Muskellonge that is sterile) and put them in the pond. I don't fish it much but I hooked a 10lb plus Tiger a few years later. Another few years later i fished again regularly I was uanble to catch anything. I think they ate every Greenie they could find! now there are more greenies coming back. Thesis: pond was originally imballanced in stocking ... Greenies took over... Tigers knocked them out, died off (they only live 6 years or So) I didn't stock bass or trout + Tigers didn't reproduce so greenies are rebounding. Kill greenies catch Tigers!