Really nice shot, especially that perch. I'd probably clone out the bright white spots on the perch. I think the feature I like best is the "expression" on the fish!! Very fitting, given his circumstances!!
This is fantastic, Piotr. I like the scales and damp spots on the perch - it tells the story of the kingfisher knocking the fish on the perch. I find the end of the perch draws attention away from the subject so have tried a more square crop.