Axolotl

An axolotl is a type of aquatic salamander native to lakes in Mexico, most notably Lake Xochimilco. Unlike most amphibians, axolotls are neotenic, meaning they retain their larval features—such as gills and a finned tail—throughout their entire lives instead of undergoing metamorphosis. Scientifically known as Ambystoma mexicanum, axolotls are known for their external feathery gills, wide smiling mouths, and the ability to regenerate entire limbs, spinal cords, and even parts of their hearts and brains.

Axolotls are typically found in shades of brown or black in the wild, but captive-bred axolotls often come in lighter colors like pink (leucistic), white, or golden. Because of their unique appearance and gentle nature, they are popular in research and as exotic pets. However, in the wild, they are critically endangered due to habitat loss, pollution, and the introduction of invasive species.