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Axolotl
The axolotl is an interesting salamander. Most other amphibians, upon reaching adulthood, loose their lungs and begin living in both the water and on land. The axolotl spends its entire life in the water and never loses its gills. The axolotl also has some of the most advanced regeneration in the animal kingdom, capable of regrowing lost limbs, organs, and even missing segments of its spinal column. Unfortunately, only being found in one location and a destruction of their habitat has led to the species becoming endangered.
