What animals are like the Axolotl?

Axolotls are also referred to as "Mexican walking fish" in Australia and New Zealand, but they are not fish. They are amphibians, specifically, salamanders. They are native to the lakes of the Mexican basin underneath and around Mexico City. The axolotl differs from normal amphibians in that the larva (the equivalent of a tadpole in frogs) never undergoes full metamorphosis to adult form. It keeps its gills and fins, and it doesn't develop the protruding eyes, eyelids and characteristics of other adult salamanders. Unlike other amphibians, it needs to remain under water. It does have basic lungs, but breathing is done almost completely through its gills, and partially through its skin as well.