Haven't been to Enid this year, but from what I understand you see that every summer there to an extent. My guess would be a turnover, others may try to chime in and say it's dead loss from crank baits. In my experience I have just as many fish that swallow a jig, minner or a combo of the two. Seen it on Sardis last year when the lake turned over, most the dead fish (all different species) were found out East in the shallower part of the lake.