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Axolotl

Ambystoma mexicanum

Conservation status IUCN: Critically endangered· CR
Axolotl (Ambystoma mexicanum)
Photograph from Wikimedia Commons · Wikipedia article (it)

Where the name comes from

From the Nahuatl āxōlōtl: ātl, water, joined to Xolotl, the dog-headed Aztec god who escorted the dead and who, to escape sacrifice, turned himself into a salamander in the lake. “The water monster” is the hidden god.

Facts

Group
Amphibians · Amphibia
Order
Salamanders
Habitat
Highland canals and lakes
Range
Only the lake system of Xochimilco, Mexico City
Size
15–30 cm
Diet
Carnivore — worms, larvae, small crustaceans
Lifespan
10–15 years

Characteristics

  • 01

    It stays larval all its life: external gills, a swimming tail.

  • 02

    Reaches sexual maturity without ever metamorphosing.

  • 03

    Regrows limbs, heart, brain and spinal cord.

What sets it apart

The axolotl is neotenic: it becomes an adult by staying a child. It is among the most widespread laboratory animals in the world and, at the same time, critically endangered in the wild — the last published survey counted very few individuals per square kilometre at Xochimilco. A species that will never die out in captivity, and that is vanishing from the only place it has ever existed.

Next species

Golden poison frog

Phyllobates terribilis