Barred Tiger Salamander (Ambystoma mavortium mavortium) 7 week old larva, showing the anatomy of the mouth and the flap that prevents water entering the digestive tract. They start to really colour up in yellow when they near metamorphosis.
"Walking fish" is a pretty general term used to describe any fish that is able to travel over land. Ironically, the Mexican walking fish isn't a fish at all, but an amphibian. It's official name is axolotl and as the name suggests, it's found in Mexico.