Axolotl (Mexican Walking Fish)

The Axolotl (Ambystoma mexicanum), also commonly known as the Mexican Walking Fish, is one of the most unique and fascinating amphibians in the world. Unlike other amphibians that undergo metamorphosis to develop lungs and live on land, axolotls exhibit neoteny (or pedomorphosis), meaning they retain their larval characteristics—such as their spectacular, feathery external gills and fully aquatic lifestyle—throughout their entire lives. They are also famous in scientific research for their extraordinary ability to regenerate lost limbs, heart tissue, and even portions of their brains without scarring.

In New Zealand, axolotls have become incredibly popular pets due to their charming, almost smiling facial expressions and low-maintenance daily routine compared to dogs or cats. However, they are sensitive creatures that require specific water conditions to thrive. A minimum tank size of 60 litres is required for a single adult axolotl, and longer tanks are vastly preferred over tall ones, as axolotls are bottom-dwellers who spend their time walking along the substrate. Because they have highly sensitive skin and gills, the water must be dechlorinated using a reliable conditioner like Seachem Prime.

One of the most critical challenges for New Zealand keepers is managing water temperature during the summer months. Axolotls stress easily when water temperatures rise above 20°C, and sustained exposure to 22°C or higher can be fatal. In warmer regions like Auckland or Northland, keeping the tank cool is a major priority, often requiring the use of aquarium fans or a dedicated chiller. Their diet should consist of high-quality earthworms, bloodworms, and specialized axolotl pellets. Never keep axolotls with fish, as fish will nip at their delicate gill feathers. Axolotls can be sourced locally via reputable hobbyists on Trade Me or specialized aquarium stores.