Rummynose Rasbora: A Comprehensive Guide (Sawbwa resplendens)
Despite their delicate appearance, Sawbwa Resplendens are relatively hardy when kept in stable water conditions and a well-maintained aquarium. Their active schooling behavior and unusual look make them a fascinating addition to peaceful community tanks.
Natural Habitat and Distribution
Sawbwa Resplendens are endemic to Lake Inle in Myanmar, a shallow freshwater lake located in the Shan State.
In the wild they inhabit:
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Clear lake waters
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Areas with aquatic vegetation
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Slow to moderately moving water
Lake Inle is known for its relatively cooler temperatures compared to many tropical fish habitats, which is important to consider when keeping this species in captivity.
Tank Size
Minimum tank size: 20 gallons
Recommended tank size: 40 gallons or larger
These fish are active swimmers and should always be kept in groups of at least 6–8 individuals. Larger groups help reduce stress and encourage natural schooling behavior.
Longer aquariums with open swimming space work best.
Water Parameters
Sawbwa Resplendens prefer slightly cooler and well-oxygenated water conditions.
Temperature: 68–75°F
pH: 7.0–8.0
Hardness: soft to moderately hard
They can tolerate a range of parameters, but stable water conditions are key for long-term health.
Aquarium Setup
A natural setup works very well for this species.
Recommended tank features include:
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Live plants
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Open swimming areas
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Driftwood or rocks
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Moderate water flow
Planted aquariums help mimic the vegetation found in their native habitat and provide areas of security for the fish.
Good filtration and regular maintenance are important since they prefer clean, oxygen-rich water.
Diet
Sawbwa Resplendens are omnivores with a preference for small foods.
In the aquarium they will readily accept:
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High-quality micro pellets
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Crushed flake foods
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Frozen foods like daphnia or cyclops
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Baby brine shrimp
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Small live foods
Feeding a varied diet helps maintain their coloration and overall health.
Behavior and Temperament
Sawbwa Resplendens are generally peaceful schooling fish that do best in groups.
Some behavioral traits include:
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Active mid-water swimmers
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Peaceful toward other species
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Males occasionally spar with each other
Male fish are typically more colorful and may display to one another during mild dominance displays.
Tank Mates
Because of their peaceful nature, Sawbwa Resplendens work well in community aquariums.
Good tank mates include:
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Small rasboras
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Tetras
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Corydoras
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Small rainbowfish
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Peaceful dwarf cichlids
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Small gouramis
Avoid aggressive or very large fish that may intimidate them.
Breeding
Sawbwa Resplendens are egg scatterers and breeding can occur in aquariums under the right conditions.
Key points for breeding:
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Spawning typically occurs among plants
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Eggs are scattered and not guarded
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Adults may eat eggs or fry
Dense plants or spawning mops can help improve fry survival.
Feeding fry infusoria and baby brine shrimp will help them grow quickly.
Fun Facts
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The species name resplendens means “shining” or “brilliant,” referring to the male’s bright coloration.
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Males develop vivid red noses and fins, while females remain more silver and subdued.
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Despite sometimes being called a rasbora, this species actually belongs to its own genus.
Conclusion
The Sawbwa Resplendens is a beautiful and unusual fish that offers something a little different for freshwater aquariums. Their bright colors, peaceful behavior, and interesting schooling dynamics make them an excellent choice for planted community tanks. When kept in groups and provided with clean, stable water conditions, these fish can thrive and become a highlight of any aquarium.
Looking to Add Fish to Your Aquarium?
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