Penang Betta (Betta pugnax) Care Guide
Betta pugnax is a robust mouthbrooding wild betta from Malayan streams, larger than most wild bettas and tolerant of varied water.
Compiled by Aquairi from published sources · Published · Updated
Overview
Betta pugnax is a robust wild betta of the family Osphronemidae, originally described by Cantor in 1849 as Macropodus pugnax. It is distributed throughout much of Peninsular Malaysia and Singapore, with related records across the region, and is a paternal mouthbrooder larger than most wild bettas.
Taxonomy
- Family: Osphronemidae
- Genus: Betta
- Scientific name: Betta pugnax
- Described: Cantor, 1849
Habitat
According to Seriously Fish and Wikipedia, the species occupies flowing hill streams with sandy substrates and leaf litter, as well as shaded forest swamps with dense vegetation and acidic, humic-stained water, often near overhanging bank vegetation, submerged leaf litter and exposed roots.
Tank requirements
- Minimum tank volume: 60 L
- Temperature: 22-26 °C (72-79 °F)
- pH: 6.0-7.5
- GH: 4-12 °dGH
- Lifespan: 3-5 years
- Water flow: medium; sandy substrate and leaf litter recommended
Diet
Betta pugnax is carnivorous, feeding on small aquatic invertebrates in nature. Seriously Fish reports captive fish accept dried foods but require regular small live or frozen foods such as Daphnia, Artemia or chironomid larvae.
Compatibility
A mid-water species that can show semi-aggressive behaviour. Seriously Fish notes it is not recommended for the standard community aquarium but can be maintained in a pair or group, being less aggressive than some congeners. Tiny nano fish and other male bettas are best avoided.
Breeding
Betta pugnax is a paternal mouthbrooder. According to Seriously Fish, the male incubates eggs for roughly 9 to 16 days. Wikipedia notes the species is not strongly territorial during the breeding season.
Conservation status
Wikipedia reports Betta pugnax as Least Concern on the IUCN Red List.
Betta pugnax Breeding Guide
Overview
Betta pugnax is a robust, stream-dwelling paternal mouthbrooder. It grows larger than most wild bettas and the male incubates the eggs and fry in his mouth rather than building a nest. It is regarded as an intermediate breeding subject.
Sexing
Males are larger, with a greater amount of iridescent scaling on the head, a broader head shape, and more extended fins than females.
Conditioning
Bring breeding stock into condition with live and frozen foods such as Daphnia, Artemia and bloodworm. Well-conditioned fish are more inclined to court and spawn.
Breeding Setup
- Temperature: 22-28 C
- pH: 4.0-7.5
- Hardness: 18-179 ppm
- Use the tightest-fitting cover possible (some breeders use plastic wrap) to maintain warm humid air
A tight cover maintaining a warm humid air layer is important so the fry can develop the labyrinth organ correctly.
Spawning Behavior & Trigger
Following courtship the pair embrace and eggs and milt are released. The female catches the eggs on her anal fin, then the male collects them in his mouth; this cycle repeats until spawning concludes.
Egg & Fry Care
The incubation period is 9-16 days, after which the male begins to release free-swimming fry. The fry are large enough to accept motile foods such as microworm and Artemia nauplii immediately, although reports note that young fish may develop health issues from excessive Artemia. Perform small, regular water changes rather than large ones.
Common Challenges
Overreliance on Artemia has been linked to fry health problems, so the diet should be varied. As with other mouthbrooders, a disturbed holding male may spit out the brood early.