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Breeding / Mouthbrooders
Mouthbrooders · Moderate

Breeding the white-margined betta

Mouthbrooder: the male holds the eggs in his mouth. After the spawning embrace the female picks the eggs off the male’s anal fin and spits them to him.

Full species page

Step by step

Pairing

Keep a small group and let a pair form.

Breeding tank

60 L dim, soft, acidic planted tank with caves and leaf litter.

What starts it

Soft acidic water and live foods.

Eggs and young

Small broods: about 10 eggs is considered a good number. The male broods them for 10-21 days, then releases fully formed, free-swimming fry.

Raising the fry

Fully formed fry released; feed baby brine shrimp and microworms.

Common mistakes
  • Hard water
  • Boisterous tankmates
  • Skipping live foods
Setup blueprint

Home setup

One breeding tank for the white-margined betta, drawn to scale from the breeding guide.

60 cm long · 30 cm deep35 cm1234567
  1. 1
    Breeding tank: 60 L · about 60 × 30 × 35 cm, 60 L from the breeding guide
  2. 2
    Sponge filter and air pump · gentle and safe for eggs and fry
  3. 3
    Heater, 24–28 °C · this species' normal range
  4. 4
    Slate or flat stone · named in the guide
  5. 5
    Cave · named in the guide
  6. 6
    Plants for cover · named in the guide
  7. 7
    Dim light, covered sides · from the guide

Water: 24–28 °C · pH 5–6.5 · soft water

A plan from the breeding guide and an adult size of 3 cm. Tank shape is a standard 2 : 1 : 1.2 box, at least 6 adult lengths long. Check each step in the guide above.

Setup blueprint

Business setup

A 120 cm rack for breeding the white-margined betta in numbers.

12234120 cm rack, 3 shelves
  1. 1
    1 breeding tank, 60 L · about 60 × 30 × 35 cm, set up like the home tank
  2. 2
    2 grow-out tanks, 120 L each · about 75 × 35 × 45 cm; twice the breeding tank, never smaller than this species' smallest tank
  3. 3
    Shared air pump and air line · one line along each shelf feeds a sponge filter in every tank
  4. 4
    Heat the room or each tank · 24–28 °C

In total: 3 tanks, about 300 L of water. A litre of water weighs about 1 kg, so check that the floor and rack can take the weight.

Sizes are worked out from the breeding tank in the guide. Tanks fit a standard 120 cm rack when they can; bigger tanks go on their own stands.

Male or female

Adult males are more colourful and have a broader head than females.

Can I breed it in my tank?

  • Takes some experience.

Day-by-day plan

Typical for mouthbrooders

  1. 21 days beforeGroup and condition

    Usually one male with several females. Feed high-quality food.

  2. Day 0Spawning

    The female takes the eggs into her mouth and stops eating.

  3. Day 21Release

    After about 3 weeks the female releases fully formed fry. Many breeders move her to a quiet tank first.

  4. Day 21First food

    Fry eat crushed flake and baby brine shrimp straight away.

  5. Day 90Grow-out

    Fry are a few centimetres long after about 3 months.

A general guide for this breeding type. Days change with temperature and species.

Simulator: guided

Stage 1 of 5Group and condition

Usually one male with several females. Feed high-quality food.

Simulator: try it yourself

Set up a virtual breeding tank and see what would likely happen.

No spawning
  • Without live or frozen food the parents aren't in breeding condition.

An educational estimate from the breeding rules, not a promise.