With a silly smile and frilly gills, the axolotl has wriggled its way into the hearts of millions, becoming a popular aquarium pet and pop culture icon in video games, children’s books and toy stores.

Axolotls are an incredible species, well known for their stylish looks, pretty pink coloring, and ability to regenerate. Unfortunately, these remarkable creatures are critically endangered. Scientists ...

The findings could aid conservation efforts for the beloved species, which is found in only one Mexico City lake.