Confidence: I'm as sure as I can be.
Notes: Dead at the side of the river as pictured. It seemed to have been dragged over the stones as there were scales between it and the water. Possibly an otter kill and the diner has been disturbed. The damage could also have been caused by rats but that wouldnt explain the death of the fish or how it got away from the water. Fish of around 6lb, around 26"/65cm long. Ova clearly visible within the damaged area.