Axolotl Feeding: Schedule, Portions, and Foods to Avoid
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An axolotl gulps its food whole. That one habit shapes nearly every feeding rule for this species, including the most important one, about what lies on the tank floor.
The Staple Diet
Axolotls are carnivores that eat a variety of invertebrate prey, and they need no plant matter at all. The gold-standard staple is earthworms or nightcrawlers: high in protein, well balanced and easy for an axolotl to digest. Pair them with a quality sinking pellet formulated specifically for axolotls or carnivorous amphibians. Frozen bloodworms, brine shrimp and daphnia work well for hatchlings and juveniles or as occasional variety, but they shouldn't be the entire diet on their own. A varied diet of worms and formulated pellets covers this species' nutritional needs without additional vitamins or minerals.
At room temperature, an axolotl embryo hatches in two to three weeks as a tiny larva that lives on live food. By 6 to 8 weeks old, that larva should be about an inch long.
Source: Ambystoma Genetic Stock Center, University of Kentucky
Worms: Cut Them Up
Cut earthworms into portions before feeding them, even to a large adult. A whole nightcrawler has perforated a salamander's stomach, and a piece sized to the head is also easier to count across the week than a worm of unknown length. For a juvenile, cut pieces or live blackworms are the only worm option.
- Buy worms from a bait or feeder supplier, never dig them from the yard, where they can carry pesticides and parasites.
- Keep blackworms cold in a covered, shallow container, rinse them daily, and throw out any dead clumps.
Tongs and Pellets
Axolotls learn to take food from long, blunt feeding tongs. Research colonies feed them that way, and it is the easiest way to see exactly how much each animal ate.
Pellets are a staple alongside the worms. An adult pellet meal is about 5 pellets. Match the pellet to the axolotl: about 1/8 inch (3 mm) from about 1.5 inches long, and about 3/16 inch (5 mm) from about 6 inches. One colony's adult pellet ran above 30% crude protein. The recommended level for a juvenile's diet is higher, above 45%.
The Substrate Mistake
Feeding over loose small stones is the most consequential mistake of all. A gulped stone can block the gut, and that kind of impaction can need surgery or kill the axolotl. The floor that avoids it is fine sand with grains under about 0.04 inch (1 mm), or a bare-bottom tank with nothing loose on it at all.
Because an axolotl gulps its food, it takes in whatever sits next to it. Feed on a bare patch, a dish, or from tongs, so the mouthful is worm and nothing else.
Feeding Frequency and Portions
Size each meal to roughly your axolotl's head, about what it finishes in 5 to 10 minutes. Anything still uneaten 15 to 30 minutes after the food went in comes out, because leftover worm and pellet fouls the water. Obesity is a recognized problem in pet axolotls, and a measured portion is what prevents it. Frequency slows down considerably as your axolotl grows:
- Hatchlings (0 to 3 months): live food 2 to 3 times daily.
- Juveniles (3 to 6 months): about once a day.
- Sub-adults (6 to 12 months): every 1 to 3 days.
- Adults (12-plus months, past about 7.5 inches): every 2 to 3 days. Adults have slower metabolisms and need that extra time to digest food properly in cool water. The 7.5 inches marks the switch to the adult schedule, not full size: most adults finish at 9 to 12 inches.
A simple adult routine alternates the two staples: a head-sized worm piece at one meal, about 5 pellets at the next, every 2 to 3 days.
After the substrate, the other common feeding mistake is keeping an adult on a juvenile's schedule. An adult fed daily the way a juvenile would be becomes obese and stresses water quality.
Foods to Avoid
Feeder fish are out. They carry a parasite risk. Fish can also contain thiaminase, an enzyme that destroys thiamine (vitamin B1), and amphibians fed frozen fish often develop a thiamine deficiency. A strip of beef heart or liver now and then is an accepted food; as a regular food it is not. Hard-shelled feeders such as mealworms, crickets and crayfish are risky too: their exoskeletons are difficult to digest and can cause internal injury.
Sorting the Meal Before It Gulps
An axolotl cannot sort its food from whatever lies around it, so the keeper does that sorting for it. A worm piece the size of its head, offered on a floor with nothing else small enough to swallow, is the meal this animal is built to gulp.
Sources & Further Reading
Last reviewed 24 Sep 2026 · 6 sources
- LafeberVet: Basic Information Sheet, Axolotl and Care of the Axolotl (client handout, 2021) (PDF, downloads)
- Ambystoma Genetic Stock Center, University of Kentucky: Guide to Axolotl Husbandry
- Experiences with the management and breeding of Mexican axolotl (Ambystoma mexicanum), for research and biobanking purposes, in a vivarium, Frontiers in Amphibian and Reptile Science (ServÃn, Alcantar-Rodriguez, and Medrano, 2025)
- Chicago Exotics Animal Hospital: Axolotl Care
- Merck Veterinary Manual: Nutritional Diseases of Amphibians
- Yandulskaya AS, Monaghan JR (2023). Establishing a New Research Axolotl Colony. Methods Mol Biol
The Axolotl Care Package puts the feeding section, an owner log and a pet-sitter sheet on paper, in a 46-page PDF you can keep by the tank, $8.99. Includes the Universal Pet Kit free: a routine chart and feeding log you can fill in.
Frequently Asked Questions
What do axolotls eat?
Earthworms or nightcrawlers make the gold-standard staple, alongside a sinking pellet made for axolotls or carnivorous amphibians. Bloodworms, brine shrimp and daphnia suit hatchlings and juveniles or add variety, but they should never make up the whole menu. No plant matter is needed.
How often should I feed my axolotl?
Hatchlings up to 3 months old eat live food 2 to 3 times a day, juveniles of 3 to 6 months about once a day, and sub-adults of 6 to 12 months every 1 to 3 days. Adults, from 12 months and about 7.5 inches, eat every 2 to 3 days because they digest slowly in cool water. Most finish at 9 to 12 inches.
Why is gravel substrate dangerous for axolotls?
They gulp food instead of picking it out, so gravel goes down with the meal. That blockage in the intestine can require surgery and can be fatal. Use fine sand under about 0.04 inch (1 mm), or run the tank bare-bottom.
Can axolotls eat feeder fish?
No. Feeder fish can bring parasites with them, and many fish carry thiaminase, an enzyme that destroys thiamine (vitamin B1) and leaves an axolotl short of it over time.
Do axolotls need vitamin or calcium supplements?
Generally no. An axolotl eating a varied mix of worms and formulated pellets gets what it needs without added vitamins or minerals.
How much should I feed an axolotl at each meal?
Roughly the size of your axolotl's head. Take out anything uneaten after 15 to 30 minutes so water quality holds.
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Written by Michael Ryan
Mike keeps two rescued bearded dragons, Dex and Cera, and writes the care guides on BeastlyFacts from his own research and mistakes. He is not a veterinarian.
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