The axolotl is a native Mexican salamander. Its external gills, which it keeps for its whole life, and its capacity to regenerate missing body parts, including limbs, have made it an iconic species. The regenerating qualities of axolotls make them popular subjects of scientific study.
They're a hot commodity in the pet trade despite being an endangered species in the wild. The name "axolotl" is Nahuatl (an Aztec language) for "water monster" or...