The shadow and the water movement at the base of the croc are of a much smaller croc than pictured. If you zoom in quite close to the base of the croc, you can see the blur from photoshop where it was enhanced. That croc would not miss a stationary piece of meat.
your right, the details look like their from a smaller croc, this pic may be photoshoped, but that is a real croc. I bet the original picture had the same croc, with it not jumping out of the water very much, so they took a picture of it getting higher up and photoshoped it in to create more buzz for the article.
enough talk, here's a video of that croc! http://www.youtube.com/watch?v=fa03JHNDOX8&feature=related