Axolotl

🌍 Overview

The axolotl is a neotenic salamander - a species that retains larval features (gills, aquatic lifestyle) permanently throughout its adult life, never undergoing metamorphosis. Technically it remains a permanently juvenile form. Endemic to the lake complex of Xochimilco near Mexico City, the axolotl is Critically Endangered in the wild with fewer than 1,000 individuals estimated remaining. Millions are kept in captivity for biomedical research (their regenerative abilities are extraordinary) and as pets.

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📜 History

The name comes from Nahuatl, joining atl for water with the name of Xolotl, the dog-headed Aztec god who, in Bernardino de Sahagun's account, took this form to escape sacrifice. The laboratory animal begins with a single shipment: in 1864, 34 live axolotls were sent from Mexico City to Paris and split between the Jardin d'Acclimatation and the Museum d'Histoire Naturelle, where six went to Auguste Dumeril. They bred so freely that Dumeril counted about 800 within a year, and their offspring went out to institutions across Europe, which is why most laboratory axolotls descend from those six. The albinism behind the pink-eyed white form came later, from a wild albino tiger salamander found in Minnesota and crossed in, work documented by Humphrey in 1967.

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