Betta unimaculata Breeding Guide
Breeding the Howong Betta Betta unimaculata: a large stream-dwelling paternal mouthbrooder with a 10-14 day oral incubation and large free-swimming fry.
Overview
Betta unimaculata, the Howong Betta, is a large paternal mouthbrooder found in clear flowing streams, isolated elevated headwater pools and turbid forested streams among vegetation and leaf litter. The male incubates the brood orally; it is regarded as an intermediate breeding subject.
Sexing
Males grow larger, are more colourful, possess a broader head shape and develop more extended fins than females.
Breeding Setup
- Temperature: 21-26 C
- pH: 5.0-7.5
- Hardness: 0-179 ppm
- Spacious tank with cover; tight lid to retain warm humid air
This larger species needs ample space, but stable water and a humid air layer above the surface remain essential for fry development.
Spawning Behavior & Trigger
Courtship involves the intensely coloured male approaching with mouth gaping and fins erect. Eggs are released in small batches during an embrace, often with several dummy attempts before spawning commences; both parents collect eggs initially, with the female spitting them into the male's mouth.
Egg & Fry Care
The incubation period is 10-14 days, at the end of which the male begins to release fully-formed, free-swimming fry. Fry measure around 5 mm and over at release and can immediately accept motile foods such as microworm and Artemia nauplii. Offer small amounts of different foods several times per day, with daily water changes of around 5-10% of tank volume to prevent waste accumulation.
Common Challenges
Because it is large and semi-aggressive, pairs need space and careful introduction. As with other mouthbrooders, a disturbed holding male may release the brood prematurely.