Agree the way the fish is being held in the first picture looks a bit suss - but I have no problem that the catch is genuine. You've got to ask how he is supporting the weight of the fish in that picture since you can't put your hands inside the gills of a big jew or they'll get scratched to hell and your also likely to damage the gills and fatally injure the fish. Whenever I've wanted to hold up a good jew for a photo I've always had to wrap my hand in a towel to protect it - and that was only with a fish I intended to keep.
Examining the pixellation along the edges of the fish may reveal that it has been 'photoshopped' but for the cheats this is easy to get around. All you have to do is 'photoshop' the picture, print out a hard copy, scan the hard copy to create a new digital file which you can then put up as an original. In the new scanned photo all the pixels will be of the same size. Can't really see the point of putting up dodgy photos anyway. Anyone who does, in my mind, is admitting they're not much of a fisherman.
Cheers Freeeedom