If your axolotl has laid eggs, the first thing you need to do is separate them from the adults. Axolotls will eat their own hatchlings, so you either move the eggs to a new container or move the parents out. From there, you’ll need to set up the right incubation conditions, prepare a food source for the larvae, and have a plan for what to do with potentially hundreds of babies.
Separate Eggs From Adults Immediately
Adult axolotls don’t show any parental instinct. They’ll happily eat hatchlings as soon as they emerge. You have the full incubation period to act, but sooner is better since it’s easier to manage eggs in a dedicated setup.
Most first-time breeders move the parents and leave the eggs in the original tank, but axolotl eggs are surprisingly tough and can be relocated without much risk. Eggs stuck to rocks can be freed by slicing the outermost jelly layer at the attachment point with a fingernail. If eggs are attached to plants, move the whole plant to the new container to avoid handling the eggs directly. For loose eggs, a wide-mouthed pipette or turkey baster works well. Forceps can also help peel eggs off hard surfaces.
Place the eggs in a shallow container, like a plastic tub or a small secondary tank. Discard any excess jelly surrounding the eggs, and spread them out so they don’t clump together. Clumping can restrict water flow around individual eggs and promote fungal growth.
Setting Up the Incubation Container
Axolotl eggs develop best in cool, clean water. The ideal temperature range for rearing axolotls is 16 to 18°C (roughly 60 to 64°F), which reflects their origins in cold Mexican lakes. They can tolerate a wider band of 10 to 28°C, but cooler temperatures within the ideal range produce healthier development and reduce the risk of fungal infections. If your home runs warm, a small aquarium chiller or placing the container in a cool room can help.
Use dechlorinated water with a neutral to slightly acidic pH (around 6.5 to 7.0 works well). Perform partial water changes daily or every other day to keep ammonia and waste from building up in the shallow container. Gentle aeration from an air stone is helpful but not strictly necessary if you’re changing water frequently. Avoid strong currents that could tumble the eggs around.
What Happens During Development
Fertile axolotl eggs look like small dark spheres (black, brown, or dark green depending on the parents’ coloring) surrounded by a clear jelly coat. Over the first few days, you’ll see the dark cell begin to divide. If an egg turns completely white, cloudy, or fuzzy, it’s infertile or has died. Remove these promptly so fungus doesn’t spread to healthy eggs nearby.
At room temperature, most axolotl eggs hatch in about two to three weeks. Cooler water slows development, warmer water speeds it up. You’ll be able to watch the embryo take shape inside the jelly: the body elongates, a tail forms, and tiny gill buds appear. Just before hatching, you can see the larva wriggling inside the egg. The hatchlings break free on their own and don’t need any help.
Feeding Newly Hatched Larvae
Freshly hatched axolotl larvae still carry a yolk sac, so they won’t eat for the first day or two. After that, they need live food small enough to fit in their mouths. The standard first food is newly hatched brine shrimp, sometimes called “baby brine shrimp.” You can hatch brine shrimp from dry cyst eggs using a simple saltwater setup. Most brine shrimp hatch within 24 to 48 hours depending on temperature, so start your hatchery a day or two before you expect the axolotl eggs to hatch.
Larvae under about 5 cm (2 inches) long should be fed brine shrimp. As they grow, you can transition to larger foods like chopped blackworms or bloodworms. Feed small amounts once or twice daily and remove uneaten food to keep the water clean.
Managing Larvae as They Grow
Very young larvae can be housed together safely. Cannibalism isn’t a significant concern at the earliest stages. It becomes a real risk once the front legs develop, which is when the larvae start snapping at anything that moves near their mouths, including siblings’ limbs and gills. Axolotls can regenerate lost limbs, but repeated injuries stress the animals and slow growth.
To reduce cannibalism once front legs appear, you have a few options. The most reliable method is reducing the number of larvae in each container. Fewer animals means fewer encounters. You can also heavily plant the containers and lower the light levels, since appetite seems to decrease in dim conditions and plants break up sight lines. Sorting larvae by size also helps, since larger individuals are most likely to bite smaller ones.
This stage is where the real space challenge hits. A single clutch can contain 100 to 300 eggs or more, and raising even a fraction of those to juvenile size means dozens of individual containers or well-managed grow-out tanks.
Deciding How Many to Raise
This is the question most egg-finders aren’t prepared for. Raising an entire clutch takes an enormous amount of space, daily feeding with live foods, and constant water changes for weeks. Most hobbyists choose to raise only as many as they can realistically house or rehome, and humanely dispose of the rest while they’re still in the egg stage. Freezing undeveloped eggs is a commonly accepted method.
If you plan to raise a manageable number, pick 20 to 50 of the healthiest-looking eggs (dark, round, no cloudiness) and keep those in your incubation setup. This gives you a realistic batch to work with and accounts for some natural losses along the way.
Rehoming Juvenile Axolotls
Once your axolotls reach juvenile size, you’ll need to find them homes. Local aquarium clubs, online axolotl communities, and social media groups dedicated to exotic pets are all common outlets. Some local fish stores will accept juveniles, though not all carry axolotls.
Before selling or giving away axolotls, be aware of the legal landscape. Axolotls are illegal to own in California, Maine, New Jersey, and Washington, D.C. These bans exist because released axolotls could breed with native salamander species and disrupt local ecosystems. Some states like Pennsylvania require a breeder permit and a sales permit in addition to a business tax number if you’re selling animals. Check your state and local regulations before advertising any for sale.
If you weren’t planning to breed and the eggs were a surprise, now is a good time to separate your male and female axolotls to prevent future clutches. Females can lay eggs every few weeks under the right conditions, and dealing with hundreds of eggs repeatedly is unsustainable for most hobbyists.