Axolotl | Description, Diet, Habitat, & Lifespan

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axolotl, (Ambystoma mexicanum), salamander of the family Ambystomatidae (order Caudata), notable for its permanent retention of larval features, such as external gills. The species is found only in Lake Xochimilco, within Mexico City, where it is classified as a critically endangered species. The name axolotl is also applied to any full-grown larva of Ambystoma tigrinum (tiger salamander) that has not yet lost its external gills.

A. mexicanum grows to about 25 cm (10 inches) long and is dark brown with black speckling. Both albino and white mutants, as well as other colour mutants, are common. The legs and feet are rather small, but the tail is long. A fin extends from the back of the head to the tip of the tail. A lower fin extends from between the hind legs to the tip of the tail. The axolotl is paedomorphic (that is, it retains its larval traits throughout adulthood). Axolotls prey on a variety of aquatic organisms, including fish, mollusks, aquatic insects, and other axolotls. Although captive axolotls may live as long as 15 years, axolotls live for only about five or six years in the wild.

Nine-Banded Armadillo.

Axolotl populations have declined considerably due to a combination of habitat loss (largely driven by Mexico City’s continued urbanization), water pollution, and invasive species (such as carp and tilapia, which compete with axolotls for food and prey upon them). Ecologists estimate that fewer than 1,000 axolotls exist in the wild, and the International Union for the Conservation of Nature and Natural Resources (IUCN) has classified the axolotl as a critically endangered species since 2006. Axolotls can be bred in captivity, where they are used for food and sold as pets. Captive populations have been introduced on occasion into remaining habitats to supplement wild populations.

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