| Category | Details |
|---|---|
| Taxonomy |
Order: Anabantiformes Family: Osphronemidae Genus: Betta Complex: Coccina group Species: Betta persephone (Schaller, 1986) |
| Natural Habitat |
Endemic to Johor, Peninsular Malaysia, restricted to peat swamp forest remnants. Water is extremely acidic (pH 3.0–4.5), stained black with humic acids, conductivity often <20 µS/cm, and light levels extremely low. Found among leaf litter, root tangles, and submerged peat formations. |
| Adult Morphology |
One of the smallest coccina bettas (males ~30–35 mm). Males: deep black‑blue body, iridescent blue fin edging, slightly extended dorsal and anal fins. Females: duller brown‑black, shorter fins, visible ovipositor when ripe. |
| Breeding Triggers |
• Conductivity drop to <30 µS/cm • pH 3.5–4.2 • Temperature 24–26°C • Heavy leaf litter + tannin saturation • Very dim lighting • Live foods for 10–14 days prior to pairing |
| Courtship Behaviour |
Males display subtle fin flaring and slow circling. Pairing is calm compared to splendens‑types. Female leads male to a small cave or leaf crevice. Pre‑spawn embraces are gentle and repeated. |
| Spawning Method |
Cave‑spawning bubble‑nest hybrid. Males build a small, fragile bubble cluster inside a leaf tube, coconut cave, or peat crevice. Eggs are placed directly into the nest and guarded by the male. |
| Egg Development |
• Clutch size: 10–25 eggs • Incubation: 36–48 hours • Free‑swimming: 3–4 days post‑hatch • Male guards nest until fry disperse • Eggs extremely fungus‑prone outside ultra‑soft acidic water |
| Larval Stage |
Larvae remain in nest until yolk is absorbed. First feeding begins day 3–4. Require micro‑foods due to tiny mouth size. Sensitive to water movement and light. |
| Fry Rearing |
• First foods: infusoria, rotifers, paramecium • Artemia only from day 10–14 • Keep water extremely still • Maintain pH <5.0 for first 4 weeks • Daily 5–10% drips with ultra‑soft water • Fry grow slowly compared to other bettas |
| Juvenile Development |
Colour appears at 6–8 weeks. Sexing possible at 10–12 weeks. Juveniles remain shy and require dense cover. Aggression is low; group rearing is possible with space. |
| Genetic Considerations |
Wild populations are critically fragmented; avoid hybridisation with other coccina species. Maintain line purity and track locality if known. Outcross every 3–4 generations to maintain vigour. |
| Health & Disease |
Extremely sensitive to: • Bacterial blooms • Elevated TDS • pH >5.5 • Strong filtration Use only fry‑safe botanicals and avoid medications unless essential. |
| Production Scaling |
Low‑yield species; commercial scaling is difficult. Best suited to specialist conservation breeding. Maintain multiple small pairs rather than large colonies. |
Rearing Protocol Summary
Conditioning Adults
- Live blackworms, grindal worms, mosquito larvae
- Very soft water (TDS < 40 ppm)
- Heavy botanicals (catappa, oak, peat fibre)
Spawning Setup
- 10–20 L tank
- Leaf tubes, coconut caves, peat crevices
- Light at 1–5% intensity
- Water depth 10–15 cm
Fry First Foods
- Infusoria
- Rotifers
- Paramecium
- Microworms (sparingly)
Growth Management
- Daily micro‑changes
- Zero current
- Add botanicals weekly
- Separate sexes at 10–12 weeks
Notes for Keepers
Betta persephone is one of the most challenging blackwater bettas to maintain long‑term.
Success depends on ultra‑soft water, botanical density, and minimal disturbance.
This species is a strong candidate for conservation‑focused breeding programmes.
