Siamese Dwarf Rasbora – Rare Nano Fish for Planted Aquariums

The Siamese Dwarf Rasbora (Trigonostigma somphongsi) is a rare and captivating nano fish from Thailand’s freshwater streams. Known for its shimmering body and distinctive black lateral stripe, it adds elegance to planted aquariums. Due to habitat loss, this species is critically endangered in the wild, so keeping and breeding them in captivity helps conservation efforts.

Perfect for small community tanks, these peaceful schooling fish thrive in groups of 8 or more. They are compatible with other small, non-aggressive species such as Chili Rasboras and Ember Tetras

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Features

• Scientific Name: Trigonostigma somphongsi

• Common Name: Siamese Dwarf Rasbora

• Size: Up to 2.5 cm (1 inch)

• Lifespan: 3–5 years

• Temperament: Peaceful and schooling

• Diet: Micro-predator; feeds on small invertebrates and zooplankton

• Water Parameters:

  • Temperature: 22–26°C (72–79°F)

  • pH Level: 5.5–7.0

  • Hardness: Soft water preferred

• Minimum Tank Size: 10 gallons.

Why Choose the Siamese Dwarf Rasbora?

• Conservation Effort: By keeping this species, aquarists contribute to the preservation of a critically endangered fish.

• Nano Tank Suitable: Ideal for small, well-planted aquariums due to its diminutive size.

• Peaceful Nature: Compatible with other small, non-aggressive species.

• Aesthetic Appeal: Its vibrant coloration and schooling behavior enhance the visual appeal of any tank.

Tank Requirements

• Substrate: Dark, fine-grained substrate to mimic natural habitat.

• Decor: Incorporate live plants, driftwood, and leaf litter to provide hiding spots and replicate their native environment.

• Filtration: Gentle filtration to maintain water quality without creating strong currents.

• Lighting: Subdued lighting to reduce stress and highlight natural colors.

• Tank Cover: Secure lid to prevent jumping.

Compatible Tank Mates

Siamese Dwarf Rasboras thrive in peaceful community tanks with similarly sized species. Suitable companions include:

• Chili Rasboras 

• Ember Tetras 

• Pygmy Corydoras 

• Cherry Shrimp.

Avoid housing with larger or aggressive fish that may view them as prey.

Feeding Recommendations

• Staple Diet: High-quality micro pellets or finely crushed flakes.

• Supplementary Foods: Live or frozen foods such as daphnia, baby brine shrimp, and microworms.

• Feeding Frequency: Feed small amounts 2–3 times daily, ensuring all food is consumed promptly to maintain water quality.

Care Tips

• Water Quality: Maintain pristine water conditions with regular water changes (20–30% weekly).

• Group Size: Keep in groups of at least 8 to promote natural schooling behavior and reduce stress.

• Breeding: Provide broad-leaved plants for egg deposition; breeding in captivity is possible with proper conditions.

• Observation: Monitor for signs of stress or illness, such as color fading or lethargy, and address promptly.

FAQs

Can Siamese Dwarf Rasboras live in a community tank?
Yes, they can coexist peacefully with other small, non-aggressive species in a well-planted community tank.

Do they require a heater?
Maintaining a stable temperature between 22–26°C (72–79°F) is essential; a heater may be necessary depending on ambient room temperature.

Are they suitable for beginners?
Due to their sensitivity to water conditions and rarity, they are best suited for aquarists with some experience.

How can I enhance their coloration?
A varied diet rich in high-quality foods, maintaining pristine water conditions, and providing a stress-free environment can help accentuate their vibrant colors.