Looks like a Common Carp to me! The over all shape of fish seems a little different than a Common's however it could be just the angle of the fish and picture. Just guessing I would say Common Carp.
Side Note: You will defiantly get an 100 percent I.D. in this section for sure!
the reason i say is the top fin caught my eye as a buff fin and the tail definately looks buffy . after googling crucian carp and looking at the top fin on them im convinced its a buff and thats my final answer hehe
Here is a picture of a 4 plus pound River Carpsucker. It's body was not nearly as bulky looking as the one pictured above. The world record River Carpsucker is just over 7 pounds if I remember correctly.
Highfin Carpsucker. We don't have many of them down here, but y'all do up there. They are usually not that fat but it looks like he's been eating well. It looks a lot like a crucian but the mouth orientation is wrong.