Posted 11/03/2008 05:45:00 PM by Douglas

What a shame to lose such an incredibly diverse creature.

The axolotl, also known as the "water monster" and the "Mexican walking fish," was a key part of Aztec legend and diet. Against all odds, it survived until now amid Mexico City's urban sprawl in the polluted canals of Lake Xochimilco, now a Venice-style destination for revelers poled along by Mexican gondoliers, or trajineros, in brightly painted party boats.

But scientists are racing to save the foot-long salamander from extinction, a victim of the draining of its lake habitat and deteriorating water quality. In what may be the final blow, nonnative fish introduced into the canals are eating its lunch — and its babies.

It's quite a shock that anything can live in the water of Xochimilco, but it's not called a "Monster Fish" for nothing. But check out what it can do:

Meanwhile, the axolotl population is burgeoning in laboratories, where scientists study its amazing traits, including the ability to completely re-grow lost limbs. Axolotls have played key roles in research on regeneration, embryology, fertilization and evolution.

The salamander has the rare trait of retaining its larval features throughout its adult life, a phenomenon called neoteny. It lives all its life in the water but can breathe both under water with gills or by taking gulps of air from the surface.

Wow, wouldn't that come in handy when swimming. I'd like to be able to regrow lost limbs.