Axolotl
Also known as: Ambystoma mexicanum
The axolotl is a neotenic salamander that retains larval features throughout life, including external gills and a finned tail. The Axolotl originates from Native to the freshwater lakes and canals of Xochimilco and Chalco in the Valley of Mexico, Mexico., reaches Adult size: 23-30 cm in captivity, typically lives 10-15 years, and is kept at 16-18°C (60-64°F); temperatures above 22°C (72°F) cause stress and increase disease risk.. Individual fish vary, so treat this as a general guide rather than a guarantee.
Species at a glance
- Origin
- Native to the freshwater lakes and canals of Xochimilco and Chalco in the Valley of Mexico, Mexico.
- Adult size
- Adult size: 23-30 cm (9-12 inches)
- Life span
- 10-15 years
- Temperament
- Generally peaceful and solitary; exhibits low aggression but may nip at tankmates if stressed or overcrowded.
- Tank size
- Minimum 75 liters (20 gallons) for a single adult; 115 liters (30 gallons) recommended for two.
- Water temp
- 16-18°C (60-64°F); temperatures above 22°C (72°F) cause stress and increase disease risk.
- pH range
- pH 6.5-8.0
- Diet
- Carnivorous; feeds on earthworms, bloodworms, brine shrimp, daphnia, and high-quality sinking pellets; avoid feeder fish due to disease risk.
- Other names
- Ambystoma mexicanum
About the Axolotl
The axolotl is a neotenic salamander that retains larval features throughout life, including external gills and a finned tail. Native to the now-degraded Lake Xochimilco system, it is critically endangered in the wild due to habitat loss and pollution. In captivity, it thrives in cool, clean water with minimal flow and ample hiding places. Its remarkable regenerative abilities make it a subject of scientific interest, though it requires specialized care to maintain health.
Lifespan and health
With optimal care, axolotls commonly live 10-15 years in captivity, with some individuals exceeding 20 years under ideal conditions. Lifespan is heavily influenced by water quality, temperature stability, and diet; chronic exposure to temperatures above 22°C (72°F) significantly shortens lifespan due to increased metabolic stress and susceptibility to infections. Regular health monitoring and prompt intervention are critical to longevity. Common health issues include fungal infections (often appearing as cotton-like patches on skin or gills), bacterial infections (causing lethargy, redness, or ulceration), and impaction from ingested substrate. Parasitic infestations, such as from anchor worms or flukes, are rare but possible. Preventive measures include maintaining pristine water, avoiding overfeeding, using safe substrates, and quarantining new additions. Any signs of distress—such as curled gills, refusal to eat, or floating abnormally—require immediate water testing and consultation with an exotic veterinarian.
Overview
The axolotl is a neotenic salamander that retains larval features throughout life, including external gills and a finned tail. Native to the now-degraded Lake Xochimilco system, it is critically endangered in the wild due to habitat loss and pollution. In captivity, it thrives in cool, clean water with minimal flow and ample hiding places. Its remarkable regenerative abilities make it a subject of scientific interest, though it requires specialized care to maintain health.
Care and tank setup
Tank setup should include a bare-bottom or fine sand substrate (avoid gravel to prevent impaction), with multiple hiding spots such as PVC pipes, ceramic caves, or live plants like Java moss or Anubias. Filtration must be gentle—sponge filters are ideal—to avoid strong currents that stress axolotls; weekly 25% water changes are essential to maintain low ammonia and nitrite levels. Lighting should be dim or indirect, as axolotls are sensitive to bright light and prefer subdued environments. Water parameters must be strictly monitored: ammonia and nitrite at 0 ppm, nitrate below 20 ppm, and temperature kept consistently between 16-18°C (60-64°F). Use a reliable aquarium heater and chiller if needed to prevent overheating, especially in warmer climates. Avoid chemicals like copper-based medications, which are toxic to axolotls. Test water weekly with a liquid test kit for accuracy. Feeding should occur 2-3 times per week for juveniles and 1-2 times weekly for adults, offering food items no larger than the width of the axolotl’s head. Earthworms (nightcrawlers) are the staple diet; supplement with frozen bloodworms or brine shrimp 1-2x weekly. Remove uneaten food within 5-10 minutes to prevent water quality degradation. Never feed mammalian meat or insects with hard exoskeletons.
Related breeds
Breed information on this page is based on the Wikipedia article on the Axolotl, supplemented with additional research. Reviewed for accuracy.