Axolotl Tank Mates: What Can Live With Axolotls?

One of the most common questions new axolotl owners ask is whether they can add other animals to their axolotl’s tank. The short answer: axolotls are best kept alone or with other axolotls.

Why Most Tank Mates Are Problematic

Axolotls create two fundamental challenges for tank mates:

1. Axolotls eat anything that fits in their mouth: they are opportunistic predators that will attempt to swallow small fish, shrimp, snails, and even each other’s limbs
2. Fish nip at axolotl gills: the feathery gills look like worms to many fish species, and constant nipping causes stress, injury, and infection

Additionally, axolotls require cool water (16-20°C) that is incompatible with most tropical fish.

Tank Mate Compatibility Chart

Keeping Multiple Axolotls Together

The best tank mate for an axolotl is another axolotl. Guidelines:

• Same size: axolotls of similar size are much less likely to injure each other. A size difference of more than 5 cm increases nipping risk.
• Adequate space: 115L (30 gal) minimum for two, with enough hides for each
• Feed separately: use feeding tongs to ensure each axolotl gets its share and they do not accidentally bite each other
• Watch during feeding: most injuries between axolotls happen when one mistakes the other’s limb for food
• Separate the sexes unless you want eggs. Females can become stressed from constant male attention.

What About Live Plants?

Live plants are excellent “tank mates” that pose zero risk:

• Java fern: tough, low-light, axolotl-proof
• Anubias: sturdy leaves, can attach to rocks
• Java moss: provides cover without risk
• Marimo moss balls: axolotls often push them around like toys

Plants improve water quality by absorbing nitrates and provide hiding spots without any of the risks associated with animal tank mates.