Sorry for the long delay, I was camping all last week. The Bowfin were there when I bought the property. Most likely from the neighbor kids, and I just now found out about them. I was able to transplant about a dozen 6" bluegill during the week... I'm also looking into getting some 8-10" bass... im hoping the bass will take out the smaller bowfin. I don't think draining the pond would be an option either... the pond exists from a high water table, I'm not sure if i could pump it out fast enough to make it worth while... Spearing season is open in Michigan, so maybe I can take out a majority of the adults. I'll keep you posted.