The axolotl, Ambystoma mexicanum, is a large salamander native to Lake Xochimilco, Mexico. It belongs to the group of salamanders known as mole salamanders.
The axolotl is dark colored with greenish mottling. Sometimes there are silvery patches on the skin. The eyes have yellow, iridescent irises. Adult axolotls can reach about 9-12 inches in length from nose to tail, and they can weigh as much as 300 grams. They usually live to around 6-8 years but can live to 15 or even 25 years. They bear three pairs of feathery gills and are plump and short-legged. If conditions are unfavorable they may fail to metamorphose, staying in the larval stage and keeping their gills but can still reproduce. Axolotls are carnivores. They eat water insects and insect larvae, small fish, worms, Daphnia, and similar small aquatic life.