The axolotl is native only to Lake Xochimilco in the Valley of Mexico and is known as one of the most unusual creatures in the natural world. They have inspiring real life superpowers such as neoteny, also known as the forever young condition which means they never appear to age, they have the ability to regenerate tail, limbs, spinal cord, and even their brain, AND their genomes are 10 times stronger than humans making them remarkably unsusceptible to cancer. These superpowers perfectly align with the powers your Superlotl will hold!
You can learn more about this endangered species here with the WWF.