Next year I will be building a 500+ish gallon indoor pond/tank. I was planning on some big silver arows etc, but ive been thinking about how much heating the pond will cost in an unheated basement SO im looking into cold water monsters now! 
Obviously tiger musky and bowfin come to mind but what do you guys think are the most monster!?

Obviously tiger musky and bowfin come to mind but what do you guys think are the most monster!?