Trouble on the waterfront in Ohio -- a couple of fishermen have been accused of cheating to make their catches seem heavier than they were ... and the video proof is damning.
Chase Cominsky and Jake Runyon -- both locals -- were apparently caught stuffing their walleye with weights and other debris ... with things coming to a head on Friday as their fish were being weighed, and then cut open to expose the truth on Lake Erie.
As you can see, tourney officials started pulling out these little metal balls from the insides of the fish that Cominsky and Runyon had up for consideration -- some are saying they're made of lead, but in any case .