Feeding an axolotl: which foods, how often and how much
The axolotl (Ambystoma mexicanum) is a strict carnivore: it eats only animal prey, never plants. Its diet directly shapes its growth and health, a topic well studied in this species so widely used in laboratories (research on Google Scholar). With a slow metabolism, it lives in cold water and digests slowly: there is no need to stuff it. Find our other pointers in the aquarium feeding section.
Suitable foods
The ideal staple is the earthworm (farmed dendrobaena), very complete, along with axolotl-specific sinking pellets. You can occasionally add bloodworms or small pieces of shrimp. Avoid prey rich in shell such as mealworms, hard to digest, and do not feed mammal meat (beef, chicken) regularly: too fatty, it clogs the liver. Ban live feeder fish from the shop, carriers of parasites and injuries.
How often and how much
An adult axolotl feeds every two to three days, while a growing juvenile eats every day. The right portion follows a simple cue: the size of its head. A well-fed axolotl has a rounded body but not a stuffed one, with no fat folds. Always remove uneaten leftovers after a few minutes: as they decompose, they degrade water quality, which is all the more critical since these animals are sensitive to it, as explained in our article on axolotl water parameters.
Mistakes to avoid
Overfeeding is the most common fault: it pollutes the tank and promotes obesity. Do not hand-feed a shy axolotl without care either, and never bring your fingers near its mouth, as its suction can grab a finger — a point we address in our guide on handling an axolotl. Finally, water that is too warm suppresses appetite and weakens the animal: see how to set up an axolotl cold-water tank.
Frequently asked questions
My axolotl refuses to eat, is it serious?
An occasional refusal is often linked to water that is too warm or to stress. Check the temperature and parameters first; a fast of a few days is not alarming in an adult.
Can you give fish pellets?
No: their composition does not cover the needs of a strict carnivore. Prefer pellets formulated for axolotls or newts.
Should you vary the food?
A staple of earthworms and pellets is enough. Occasional variety is a plus, but the key is regularity and quality, not diversity.
This guide is part of Planète Pets’s Fishkeeping universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.