Axolotl Breeding: Sexing, Courtship & Egg Care

Breeding axolotls is a rewarding experience, but it requires preparation and commitment. A single breeding event can produce hundreds of eggs, and raising the larvae demands time, space, and resources.

Sexing Axolotls: Male vs Female

Axolotls can be reliably sexed once they reach sexual maturity (12-18 months).

The cloaca (the bump behind the rear legs) is the most reliable indicator. Males have a prominent, swollen cloaca that is visible from the side. See our detailed male vs female comparison for more identification tips.

Triggering Breeding

Axolotls naturally breed when they experience a temperature change that mimics seasonal shifts:

1. Cooling period: reduce temperature to 12-14°C for 2-4 weeks
2. Gradual warming: slowly raise temperature back to 16-18°C
3. Conditioning: feed high-quality food (earthworms) during this period

This temperature cycling signals to the axolotls that spring has arrived and triggers breeding behavior.

The Breeding Process

1. The male deposits spermatophores (small, white, cone-shaped packets) on the tank floor
2. He performs a courtship dance, nudging the female and leading her over the spermatophores
3. The female picks up the spermatophore with her cloaca
4. Within 24-72 hours, she begins laying eggs on plants, decorations, and tank walls
5. Egg laying can take 12-48 hours and result in 100-1,000 eggs

Egg Care

• Remove eggs from the parent tank to prevent the adults from eating them
• Place in a separate container with clean, cool water (16-18°C)
• Remove any white, opaque eggs (unfertilized) to prevent fungus spreading to healthy eggs
• Perform daily water changes on the egg container
• Fertile eggs are transparent with a visible dark embryo that grows larger each day
• Hatching occurs in 14-21 days

Raising Baby Axolotls (Larvae)

Newly hatched axolotls are tiny (about 1 cm) and require special care:

• First 24-48 hours: they live off their yolk sac and do not need feeding
• First food: live baby brine shrimp (newly hatched artemia) or microworms
• Separate by size: larger larvae will cannibalize smaller ones
• Daily water changes: essential for survival
• Individual containers: ideal for the first few weeks, especially if sizes vary

At about 2 months, you can switch to bloodworms and small earthworm pieces. By 4-6 months, they can eat the same food as adults.

Important Considerations Before Breeding

• Space: you may need to house 100+ babies temporarily
• Time: raising larvae requires daily feeding and water changes for months
• Rehoming: have a plan for finding homes for the juveniles
• Genetics: avoid breeding related axolotls to prevent genetic issues