Northern pike (a.k.a. snot rockets, slimers, snakes, freshwater barracuda, water wolves, slough sharks) will keep some of the pattern when dried. Not as brilliant as when alive, though.
I had some 8 pounders filleted and the hides drying, but my old dog got a hold of them. The resulting gaseous emissions that nite were bad enough to lift the seasoning outa my cast iron skillets!