Paternal mouthbrooder. After the spawning embrace the female passes the eggs to the male, who broods them for 9-12 days and then releases free-swimming fry that take microworm and Artemia nauplii at once. Adults usually leave the fry alone.
Keep a small group; males and females pair naturally.
40 L planted tank with caves and floating plants, soft neutral water.
Live foods and clean water.
Egg count not given by sources; the male holds the eggs for 9-12 days.
Release large fry which take baby brine shrimp.
One breeding tank for the javan mouthbrooding betta, drawn to scale from the breeding guide.
Water: 22–27 °C · pH 6–7.5 · soft water
A plan from the breeding guide and an adult size of 5 cm. Tank shape is a standard 2 : 1 : 1.2 box, at least 6 adult lengths long. Check each step in the guide above.
A 120 cm rack for breeding the javan mouthbrooding betta in numbers.
In total: 4 tanks, about 240 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.
Mature males have a broader head and are more colourful than females, with more iridescent scales on the head, body and unpaired fins; the dark fin margins are most pronounced in males.
Typical for mouthbrooders
Usually one male with several females. Feed high-quality food.
The female takes the eggs into her mouth and stops eating.
After about 3 weeks the female releases fully formed fry. Many breeders move her to a quiet tank first.
Fry eat crushed flake and baby brine shrimp straight away.
Fry are a few centimetres long after about 3 months.
A general guide for this breeding type. Days change with temperature and species.
Usually one male with several females. Feed high-quality food.
Set up a virtual breeding tank and see what would likely happen.
An educational estimate from the breeding rules, not a promise.