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Axolotl

Ambystoma mexicanum · also called Mexican walking fish

IntermediateFamily Ambystomatidae

The perma-smiling cold-water salamander — get the water right and the rest is easy.

🖼️ Free Axolotl wallpapers — phone & desktop →

A cartoon axolotl beside a hopeful little fish, its mouth already opening — the joke that to an axolotl a 'tankmate' is really a snack. The point: axolotls are ambush predators that eat small tankmates and fish, so they are best kept alone.
To an axolotl, a 'tankmate' is a snack with extra steps — they are ambush predators that eat small fish and nip other animals. Safest kept one axolotl per tank.

✅ We have a full, fact-checked care sheet for the Axolotl.

Open the Axolotl care sheet →

📋 At a glance

Tank
20 gal long minimum (1 adult), +10 gal each extra
Temp
16–18°C / 60–64°F — cold water, NO heater
Floor
Bare bottom or fine sand (never gravel)
Food
Earthworms/nightcrawlers (staple) · soft sinking pellets
Lifespan
10–15+ years

Water: Ammonia 0 · Nitrite 0 · Nitrate <20 ppm · pH 7.0–8.0 · always dechlorinate

🛒 Before you buy

  • 20 gal+ tank, cycled for 4–8 weeks BEFORE the axolotl
  • Sponge or baffled filter (gentle flow), thermometer, liquid test kit
  • Fine sand or bare bottom + a shaded hide
  • A summer cooling plan (fan / chiller) — the setup often costs more than the animal

A healthy one: Full, fluffy gills · four legs and all toes · alert · no fungus or injuries · kept on sand (not gravel) in cool water.

🚨 See a vet / act now if…

  • Gills curling forward or shrinking
  • Not eating for over a week
  • Floating, bloating, or gulping air
  • Cotton-like fungus, or red/irritated skin

⛔ Never

  • Warm water
  • Gravel substrate
  • Handling

Common axolotl questions

How hard are Axolotls to keep — are they good for beginners?

Intermediate. Hardy, but demands cold water + a fully cycled tank.

What do Axolotls eat?

Earthworms/nightcrawlers (staple) · soft sinking pellets

What size tank do Axolotls need?

20 gal long minimum (1 adult), +10 gal each extra

What temperature do Axolotls need?

16–18°C / 60–64°F — cold water, NO heater

What substrate do Axolotls need?

Bare bottom or fine sand (never gravel)

How long do Axolotls live?

10–15+ years

What water parameters do Axolotls need?

Ammonia 0 · Nitrite 0 · Nitrate <20 ppm · pH 7.0–8.0 · always dechlorinate

What are the signs Axolotls are sick?

See an exotics vet if you notice: Gills curling forward or shrinking; Not eating for over a week; Floating, bloating, or gulping air; Cotton-like fungus, or red/irritated skin.

Free tools for the axolotl

Calm, honest help — each one knows when to say "see a vet."

Symptom checkerTriage a worrying sign and know when to see a vet.Water interpreterMake sense of your water-test numbers.What morph is my axolotl?Identify your axolotl's colour morph in two questions.Male or female?The honest way to sex this one — and when you can tell.Common questionsReal questions keepers ask — answered straight.

📚 More axolotls guides

🎓 Ready to go deeper?

Past the basics — genetics & morphs, responsible breeding, tankmates, and advanced setups. Same plain voice, no ceiling:

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