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Betta Simorum
Betta simorum
Also known as Simor Betta
Animalia›Chordata›Perciformes›Osphronemidae
Betta simorum is a mouthbrooding betta species native to Southeast Asia, known for its peaceful temperament compared to other bettas. This species exhibits beautiful coloration and is suitable for community tanks with proper tank mates. They are moderately easy to care for and make excellent additions to planted aquariums.
Where it's from
Native to the Batang Hari and Indragiri river basins
Indonesia
At a glance
- Size
- 3.5 in
- 9 cm
- Min tank
- 20 gal
- 76 L
- Temp
- 75–82°F
- 24–28°C
- pH
- 6.0-7.0
- GH
- 71–143 ppm
- 4–8 dGH
- Temperament
- Peaceful
- Swims
- Top
- Lifespan
- 4-6 yrs
Ammonia 0 ppm and nitrate under 20 ppm.
Care
Diet
Betta simorum are carnivorous and prefer small live foods such as bloodworms, brine shrimp, and daphnia. High-quality pellets designed for bettas can supplement their diet. Feed small portions 1-2 times daily, adjusting based on appetite and tank conditions.
Behavior
This peaceful betta species is less aggressive than Betta splendens and can coexist with compatible tank mates. They are active swimmers that enjoy exploring planted areas and will display natural behaviors like bubble nesting. Males may show mild territorial behavior but rarely engage in serious aggression.
Breeding
Betta simorum are mouthbrooders, with females incubating eggs in their mouths. Breeding requires a dedicated tank with dense vegetation and stable water conditions. Pairs should be conditioned with live foods before breeding, and fry require infusoria or liquid fry food upon release.
Tank mates
See all 6Small, peaceful schooling fish that occupy different water zones
Peaceful bottom dweller that helps with algae control
Peaceful invertebrate that aids in tank maintenance
Peaceful bottom feeder that won't compete for resources
Live plant that provides shelter and natural environment
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Common diseases 4Fin Rot, Ich (Ichthyophthirius multifiliis), Velvet Disease, Mouth Fungus
Fin Rot
Frayed or deteriorating fins, discoloration at fin edges, lethargy
Perform 25% water changes daily, maintain pristine water quality, use aquarium salt or antibacterial medication if severe
Ich (Ichthyophthirius multifiliis)
White spots on body and fins, excessive scratching, rapid breathing
Raise temperature gradually to 28-30 C (82-86 F), use ich medication, perform daily water changes, ensure good aeration
Velvet Disease
Gold or rust-colored dust on body, clamped fins, lethargy, difficulty breathing
Reduce light exposure, raise temperature to 28-30 C (82-86 F), use copper-based medication, perform frequent water changes
Mouth Fungus
White cottony growth around mouth area, difficulty eating, behavioral changes
Improve water quality with frequent changes, use antifungal medication, isolate affected fish if possible, maintain optimal temperature
Legality
No state or federal restrictions on record.
Not legal advice, and possibly incomplete or out of date. Rules vary by state and change over time; check with your state wildlife or agriculture agency before buying, keeping or shipping it.
The care information here is written with AI help, so it can contain mistakes. Spot one? Tell us and we'll fix it. Native range: Tedesco et al. 2017 (CC0).
At a glance
- Size
- 3.5 in9 cm
- Min tank
- 20 gal76 L
- Temp
- 75–82°F24–28°C
- pH
- 6.0-7.0
- GH
- 71–143 ppm4–8 dGH
- Temperament
- Peaceful
- Swims
- Top
- Lifespan
- 4-6 yrs
Ammonia 0 ppm and nitrate under 20 ppm.
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