>>32119425Croconaw and Feraligatr's pelts both compliment their jaws. With Croconaw, it's more with the general shape of the two features, with both its jaw and pelt having the same convex angle to them. In Feraligatr's case, it's more about the size of the features relative to the rest of the design.
The spots and scales help break up the design so that the designs are less bland. The spots indicate Croconaw as a caiman, which would be a good middle evolution between a crocodile and alligator.