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Betta macrostoma
Males are red with a red gill-cover patch and a conspicuous dorsal-fin eyespot; the gill cover lacks iridescent scales.
Males are red with a red gill-cover patch and a conspicuous dorsal-fin eyespot; the gill cover lacks iridescent scales. A relatively large mouthbrooding betta from Brunei and Sarawak.
- Adult length
- Up to 10 cm (standard length, without the tail fin)
- Water temperature
- 20–25 °C
- pH
- 4–6
- Hardness
- 0–5 dGH
- Natural habitat
- Uses shallow pools along stream beds and tributaries, often in near-still pockets, also occurring in clear streams near waterfalls.
Needs relatively cool, soft, acidic water and a quiet environment. Disturbed mouthbrooding males may swallow their eggs.
Appearance and identification
Males are red with a red gill-cover patch and a conspicuous dorsal-fin eyespot; the gill cover lacks iridescent scales.
Social behaviour and territory
Prefer a naturally formed pair. Males fight persistently when housed together; arbitrarily matched males and females may also injure each other.
Diet and feeding
Try suitably sized dry food, alternating with live or frozen foods such as Daphnia and brine shrimp. Feed small portions and avoid overfeeding. Larger fish may occasionally receive earthworms.