Axolotlウーパールーパー

Species Data

Classification

Urodela (Caudata) / Ambystomatidae Source

Distribution

Endemic to the freshwater lake system of Xochimilco (historically also Lake Chalco) in the Valley of Mexico, with wild numbers collapsing due to habitat loss, pollution, and invasive species. Source

Did You Know?

• Axolotls exhibit neoteny, reaching sexual maturity while retaining their larval form—external gills and all—and remain fully aquatic their entire lives instead of undergoing metamorphosis. Source
• Axolotls can regenerate not only lost limbs and tails but also parts of the spinal cord and heart, making them a key model organism in regenerative medicine research worldwide. Source
• In the wild, the species is Critically Endangered on the IUCN Red List, with the adult population in Lake Xochimilco estimated at only 50 to 1,000 individuals, even as it became a household pet in Japan following a 1980s Nissin Foods ad campaign that popularized the name "Wooper Looper." Source

FAQ

Why doesn't the axolotl ever turn into a land-dwelling salamander?

Axolotls exhibit neoteny, meaning they reach full sexual maturity while retaining their larval, gilled, aquatic form rather than undergoing metamorphosis into a terrestrial adult like most salamanders. Source

What makes axolotls important for science?

Their extraordinary regenerative ability—regrowing entire limbs and tails and even repairing parts of the spinal cord and heart—makes them one of the most important model organisms in regenerative medicine research. Source

Are axolotls endangered in the wild?

Yes, critically so. The IUCN lists the axolotl as Critically Endangered, with the wild population confined to the Xochimilco lake system near Mexico City and estimated at only 50 to 1,000 adults due to habitat loss, pollution, and invasive species. Source