Ambystoma mexicanum
Axolotl
Axolotls are neotenic salamanders that never leave the water. They are charming and long-lived if you can reliably keep the tank cool.
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At a glance
- Scientific name
- Ambystoma mexicanum
- Family
- Ambystomatidae
- Origin
- Lake Xochimilco, Mexico — critically endangered in the wild
- Lifespan
- 10–15 years
- Adult size
- 23–30 cm
- Weight
- 60–200 g
- Temperament
- Placid, curious and entirely aquatic
- Activity level
- Low; mostly resting on the bottom
- Social needs
- Solitary or same-size pairs only; they bite each other's gills
- Intelligence
- Learns feeding routines
- Noise
- Silent
Housing and environment
- Housing
- Minimum 75 litres for one adult, filtered with gentle flow and a lid
- Space requirement
- Floor area matters more than depth
- Temperature
- 16–18°C, never above 22°C
- Humidity
- Fully aquatic
- Exercise
- Gentle swimming space with low flow
- Grooming
- Not applicable; water quality is everything
Life stages and changing needs
Expanded care guidance · Updated 7 October 2026 · Not professionally reviewed
Young animals and settling in
Larvae and adults may have very different feeding and habitat needs. Establish which stage you are adopting and obtain a species-specific plan before arrival. Some species retain aquatic larval traits throughout life, while others undergo metamorphosis. Do not assume that care for a tadpole, an axolotl and an adult newt is interchangeable.
Adult care and reproductive changes
Adults need an established, escape-proof aquatic system with easy access to the surface when required. Size differences can create predation and biting risks even among the same species. Do not casually combine frogs, newts, fish or shrimp. Breeding and egg care require separate planning, and unwanted offspring must never be released into local water.
Later life and changing needs
In later life, keep the environment stable and make food and resting areas accessible without changing the animal into a shallower or warmer setup arbitrarily. Document body condition and feeding response. Reduced movement may signal unsuitable water or illness, not simply age. A veterinarian experienced with amphibians can distinguish a care problem from disease.
Diet and feeding
Sinking carnivore pellets, earthworms and occasional bloodworm
Use foods appropriate to the exact amphibian and its size, such as suitable complete amphibian diets and responsibly sourced invertebrates. A varied diet is different from random leftovers. Do not assume fish flakes provide a complete ration, and avoid wild-caught prey that may carry pesticides or parasites. Ask about supplementation rather than dosing by guesswork.
Observe feeding directly because an animal can appear active yet miss every meal. Offer food where it can find it, keep fingers away from its mouth, and remove leftovers without chasing the animal. Feeding schedules change with size and water temperature. Swelling, weight loss or persistent refusal needs assessment rather than progressively larger meals.
Daily care and ongoing checks
Every day
Check water temperature, filter flow, access routes and the animal itself each day. Use appropriately treated water and measure ammonia and nitrite in a cycled system. Strong current can be stressful for species adapted to still water. Amphibian skin is vulnerable to chemicals; keep aerosols, soaps and residues well away from the enclosure.
Regular maintenance and prevention
Base water changes on measured quality and avoid sudden changes in temperature or chemistry. Minimise handling, preferably using a suitable container for transfers. When contact is unavoidable, follow veterinary advice on appropriate gloves and hygiene. Quarantine new amphibians separately; equipment can transmit serious infections between enclosures even when animals never meet.
Behaviour and compatibility
Bottom-walking, gulping surface air occasionally, regenerating lost limbs
- With children
- A wonderful observation pet; do not handle
- With other animals
- Keep alone — fish nip their gills and axolotls swallow small fish
- Training difficulty
- Not applicable
Health
- Heat stress
- Fungal infections
- Impaction from gravel
- Ammonia burns
- Gill damage from strong flow
Aquatic exotics vet; cooling equipment is often essential in warm climates
Special care requirements
Use fine sand or bare bottom; gravel causes fatal impaction
Cool water and injury prevention
Axolotls normally retain external gills and remain aquatic rather than becoming land salamanders. Do not attempt to induce metamorphosis. Their cool-water requirements differ from tropical fish, and warm rooms may require active cooling planned before adoption. Track actual water temperature through hot weather instead of relying on room temperature estimates.
Avoid tank mates that bite gills or can be swallowed, and assess size differences between axolotls. Substrate and loose objects must be chosen to reduce ingestion and obstruction risk. Observe gill appearance, posture and feeding. Fridging, salt baths and other online remedies should not replace an amphibian-vet diagnosis and treatment plan.
Before you take one on
Sources and further guidance
These welfare and veterinary resources inform general husbandry advice; they do not certify this profile or replace a species-experienced professional. Confirm exact environmental settings and feeding plans for your animal.
Quick answers
- What is an axolotl?
- The axolotl (Ambystoma mexicanum) is a salamander that keeps its larval gills and lives in water as an adult. It is native only to the lake system around Mexico City and is critically endangered in the wild. People often misspell it as axolotle or oxelotle. IUCN Red List
Can your home meet axolotl needs?
- Plan for a lifespan of 10–15 years, including holiday cover and, where one is available, a vet familiar with this species. Lifespan ranges are not guarantees.
- Arrange the social setting before arrival. Social guidance for this species: Solitary or same-size pairs only; they bite each other's gills. Do not assume another animal of any species is a suitable companion.
- Habitat priority for this species: Floor area matters more than depth. Make sure your setup can provide this consistently. Measure temperatures and humidity with thermometers and a hygrometer rather than guessing.
- Key care point: Use fine sand or bare bottom; gravel causes fatal impaction. Discuss diet and any specialist needs with the supplier, rescue and a vet who treats this species, and check local legal requirements before acquiring an animal.
Educational reference, not an individual diagnosis or a verified professional review. Read our editorial policy.
Guidance libraries and further reading
These organisations publish relevant guidance. Their links are further reading, not evidence that they have reviewed this page.
