When I first saw the photo of Crawl I was certain that you have a larval tiger salamander on your hands, however the fact that his gills are getting longer does not seem in-line with my initial hypothesis. As Eric mentioned earlier, I think some more up-to-date photos might help.
Whatever he ends up being, he is mighty cute! I love it how he was sold to you as an axolotl "with a tiger print." I am not an axolotl expert, but that dude sounds full of it. : )