European rivers are cleaner than they are here. In Russia they spearfish in the Volga. Our biggest rivers are like mud, you wouldn't be able to see your hand in front of your face. I don't know about where you live, but around here carp are a river fish. Every year in the town I live in we have a one day competition where TONS of carp are pulled from our local section of the Wisconsin river. I am proud to say that my brothers team used to almost always win this competition, and the team I am on now came in second to a team that cheats. (With hundreds of pounds of carp, we lost by 3lbs.