what axolotls are and what makes them unique

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Across
  1. 5. - AQUATIC
  2. 9. form - NEOTENIC
  3. 12. as pets - AQUARIUMS
  4. 13. abilities - HEALING
  5. 14. - FRESHWATER
  6. 15. - NIGHTTIME
Down
  1. 1. species - THREATENED
  2. 2. external gills - BRANCHIAE
  3. 3. creature - AMPHIBIAN
  4. 4. colored - PIGMENTED
  5. 6. of metamorphosis - PAEDOMORPHIC
  6. 7. name - AMBYSTOMA MEXICANUM
  7. 8. salamander - AXOLOTL
  8. 10. regeneration - REGENERATION
  9. 11. carnivorous - CARNIVORE