Axolotl Breeding: Sexing, Courtship & Egg Care

📅

12-18 moAge of sexual maturity

🥚

100-1,000Eggs per spawning event

⏳

14-21 daysHatching time

📏

~1 cmSize at hatching

Before You Start Breeding

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.

Make sure you have a plan for rehoming juveniles before you start. You may need to house 100+ babies temporarily, with daily feeding and water changes for months.

Pair of axolotls during courtship with eggs

Sexing Axolotls: Male vs Female

Feature	Male	Female
Cloaca	Noticeably swollen	Flat, barely visible
Body shape	Longer, slimmer	Rounder, wider body
Tail	Longer relative to body	Shorter relative to body
Size	Slightly smaller on average	Slightly larger on average

Cloaca

Male : Noticeably swollen

Female : Flat, barely visible

Body shape

Male : Longer, slimmer

Female : Rounder, wider body

Tail

Male : Longer relative to body

Female : Shorter relative to body

Size

Male : Slightly smaller on average

Female : Slightly larger on average

💡

Most Reliable Indicator

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

How to Trigger Breeding

Cooling period: reduce temperature to 12-14°C for 2-4 weeks to simulate winter

Gradual warming: slowly raise temperature back to 16-18°C to mimic spring arrival

Conditioning: feed high-quality food (earthworms) during this entire period

Male deposits spermatophores: small, white, cone-shaped packets on the tank floor

Courtship dance: male nudges the female and leads her over the spermatophores

Female picks up spermatophore with her cloaca for internal fertilization

Egg laying begins: within 24-72 hours, she lays 100-1,000 eggs over 12-48 hours

⚠️

Remove Eggs Immediately

Adult axolotls will eat their own eggs. Remove the eggs from the parent tank as soon as you notice them. Place them in a separate container with clean, cool water (16-18°C). Remove any white, opaque eggs (unfertilized) to prevent fungus from spreading to healthy eggs.

Egg Care Essentials

🌡️

Temperature

Keep egg container at 16-18°C. Cooler water = slower development. At 18°C, expect hatching around 14-17 days.

💧

Water Changes

Perform daily 100% water changes on the egg container. Use dechlorinated water at the same temperature.

🔍

Remove Bad Eggs

Infertile eggs turn white and opaque within 24-48 hours. Remove them immediately to prevent fungus spread.

🧪

Methylene Blue

A few drops in the water can prevent fungal growth. Optional but recommended for large batches.

Raising Baby Axolotls (Larvae)

✓

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 in small containers

✓

Individual containers: ideal for the first few weeks, especially if sizes vary

✓

At 2 months: switch to bloodworms and small earthworm pieces

✓

At 4-6 months: they can eat the same food as adults

Before You Breed: Are You Ready?

✓

You Need

✓Space to house 100+ babies temporarily
✓Time for daily feeding and water changes for months
✓A plan for rehoming juveniles
✓Unrelated breeding pair (avoid genetics issues)

✗

You Should Have

→At least 18-month-old healthy adults
→Separate containers or tanks for larvae
→Live baby brine shrimp culture or supply
→Contact with local axolotl groups for rehoming

Egg Care in Detail

Your axolotl laid eggs? Get the full step-by-step guide to identifying fertile eggs, daily care, and the hatching timeline.

Axolotl Egg Care Guide →

Prerequisites

Before You Breed

📏

Minimum Age

Both parents

18 months old

Required

🔎

Sexing

Males have swollen cloaca

Visible from 12 months

🐟

Separate Tank

For eggs & larvae

Min. 40 L / 10 gal

🌡️

Cool Trigger

Temperature drop to 12-14 °C

Mimics winter

Key step

🥚

Egg Count

Per clutch

100 - 1000 eggs

🍼

Larvae Care

Intensive first weeks

Daily feeding, water changes

Dive Deeper

Articles in This Section

Tiny baby axolotl larva with transparent body and developing gills macro shot

Baby Axolotl Care: From Eggs to Juvenile

Raising baby axolotls from hatching to juvenile: first foods (brine shrimp), water requirements, growth milestones, cannibalism prevention, and size separation.

Transparent axolotl eggs with tiny embryos visible attached to aquatic plant

Axolotl Eggs: What to Expect & How to Care for Them

Your axolotl laid eggs? Step-by-step guide to egg care: identifying fertile vs infertile, water conditions, timeline to hatching, and what to do next.

Side-by-side comparison of male and female axolotl body differences

Male vs Female Axolotl: How to Tell the Difference

How to sex your axolotl: cloaca shape, body differences, and the minimum age for reliable identification. Visual comparison guide.

Illustration of axolotl life cycle from egg to larva to juvenile to adult

Axolotl Life Cycle: From Egg to Adult

Follow the axolotl life cycle stage by stage: egg, larva, juvenile, sub-adult, and adult. Growth timeline, milestones, and what to expect at each phase.

🧬

Predict Offspring Colors

Select parent morphs to see expected baby colors

FAQ

Frequently Asked Questions

At what age can axolotls breed?

Axolotls reach sexual maturity between 12-18 months of age, though it is recommended to wait until they are at least 18 months old to ensure they are fully developed and healthy enough for breeding.

How many eggs do axolotls lay?

A female axolotl can lay between 100 and 1,000 eggs per spawning event, with 200-600 being typical. Not all eggs will be fertile, and survival rates depend on care conditions.

How long do axolotl eggs take to hatch?

Axolotl eggs typically hatch in 14-21 days, depending on water temperature. Cooler water leads to slower development. At 18°C, expect hatching around 14-17 days.