What is the name of the unique salamander species, native to the canals of Xochimilco, that retains its larval gills throughout its entire life (neoteny) and has remarkable limb-regeneration abilities?

• A Siren
• B Mudpuppy
• C Axolotl ✓
• D Olm

The axolotl never undergoes metamorphosis, remaining aquatic and gilled even as an adult, and is critically endangered in the wild despite being common in laboratories worldwide.