The short answer
Axolotls should live alone or with other adult axolotls of a similar size. Fish, and most other aquarium animals, are a poor fit for three reasons:
- Gill nipping. Axolotl gills are feathery, slow-moving and irresistible to many fish. Damaged gills are painful and invite infection.
- Eating each other. Axolotls suction-feed on anything that fits in their mouth, including small fish, shrimp and snails. Swallowed animals (and their spines or shells) can cause injury or impaction.
- Different water needs. Axolotls need cool water, around 60–64°F (16–18°C). Most aquarium fish are tropical and need 75°F+ (24°C+), which is too warm for an axolotl.
Common tank mates people ask about
| Animal | Verdict | Why |
|---|---|---|
| Goldfish | No | Nip gills, lots of waste, can be swallowed; feeder goldfish carry parasites |
| White Cloud Mountain minnows | No | Cool-water, but nip gills and get eaten |
| Guppies, tetras, bettas | No | Tropical; nip gills; eaten |
| Plecos, algae eaters | No | Suck on axolotl slime coat |
| Shrimp (cherry, ghost) | Risky | Often eaten; treat as food |
| Snails | Risky | Often eaten; can carry parasites; shells may be swallowed |
| Other adult axolotls | Yes | Similar size, enough space and hides |
Keeping two axolotls together
Two adult axolotls (roughly 6 inches or more) can live together if:
- The tank is at least 40 gallons, ideally a 40-gallon breeder (36×18 in) or larger.
- There are several hides so they can get away from each other.
- They're similar in size: a much bigger axolotl may bite or try to eat a small one.
- You're happy with the possibility of eggs if you have a male and a female.
Don't house juveniles together. Young axolotls under about 5 inches regularly bite off each other's limbs and gills. They regrow, but it's stressful and can lead to infection. Raise them separately until they're adults.
What about "cleaner" animals?
There's no need for clean-up crews. Good filtration, regular water changes and removing uneaten food keep an axolotl tank clean. If you like live plants, choose low-light species such as anubias, java fern and floating plants.
Getting the basics right
A lot of axolotl problems blamed on tank mates are really water problems. Keep the tank cycled, the water cool and ammonia and nitrite at zero. New to cycling? See our guide to cycling an axolotl tank, and the full axolotl care sheet for tank size, substrate and feeding.
FAQ
Can axolotls live with goldfish? No. Goldfish nip gills and can be swallowed.
Can axolotls live with shrimp or snails? It's risky; they're often eaten.
Can two axolotls live together? Yes, similar-sized adults in 40+ gallons with hides. Not juveniles.