Yeah those would be the carp. Hear they are tipping the scales at around 20 some odd pounds. I researched methods from back east and Europe to hook into a coule of these slabs. Quite the art to taking these things consistently. Down side is that any really effective means of bringing these fish in are considered illeagle in our waters. I mixed up a wonderful smelling concoction of cornmeal, sweet corn, and strawberry jello mix that was to be used to make softball sized chunks to chum the area between Beaver and Elk. Apparently that is a NO NO. With a good pair of polarized glasses you can actually see the game trails these fish have carved out while foraging the bottom. This is where you want your baited rig to fall and sit while waiting for a slab to come up on it. The fish graze like cows. It takes alot of patience. I tried it and caught about a hundred catfish in only a few hours. Lots of LARGE carp around but no hookups. The big problem is that your baitrig gets all messed up with milfoil before it hits bottom. A trick they use use back east and in Europe is a desolving gel sac that contains your rig. Once it punches it's way through the milfoil it sits nicley on the bottom. It eventually dissolves fully leaving a perfectly placed rig just ready for old carp to suck it up.
Give it a shot. Let me know how you do.
Mark