The Siamese Dwarf Rasbora, scientifically known as Trigonostigma somphongsi, is a small and striking species of freshwater fish native to the slow-moving waters and peat swamps of Thailand. This species is highly valued by aquarists for its vibrant coloration, peaceful demeanor, and small size, making it an excellent choice for nano aquariums and well-planted community tanks.

Siamese Dwarf Rasboras are characterized by their slender, elongated bodies and brilliant colors. Their bodies typically display a shimmering orange or red hue with a distinctive black triangular patch extending from the mid-body to the tail. This striking pattern, combined with their small size and active swimming behavior, makes them a standout addition to any aquarium.

In captivity, Siamese Dwarf Rasboras thrive in aquariums that closely mimic their natural habitat. A tank setup should include a soft, sandy substrate and plenty of live plants, such as Java moss, Anubias, and floating plants, which provide cover and create a comfortable environment. Adding driftwood and leaf litter can help replicate the tannin-rich waters they are accustomed to, enhancing their colors and providing additional hiding spots.

Water conditions should be soft and slightly acidic, reflecting the peat swamp conditions they originate from. Maintaining stable water parameters through regular water changes and efficient filtration is crucial for the health and well-being of Siamese Dwarf Rasboras. They are sensitive to poor water quality and fluctuations in water conditions, so consistency is key.

Siamese Dwarf Rasboras are social fish that should be kept in groups of at least six or more to promote their well-being and natural schooling behavior. Keeping them in a school not only reduces stress but also enhances their vibrant colors and active swimming patterns. They are peaceful and can be housed with other small, non-aggressive fish, making them ideal for community tanks.

Their diet should be varied to ensure they receive all necessary nutrients. Siamese Dwarf Rasboras are omnivorous and will readily accept high-quality flake foods, micro pellets, and live or frozen foods such as brine shrimp, daphnia, and bloodworms. Providing a mix of these foods will help maintain their health, vibrant colors, and energetic behavior.

Breeding Siamese Dwarf Rasboras in captivity can be challenging due to their specific environmental needs. They are egg scatterers, typically laying their eggs among fine-leaved plants. To encourage breeding, maintain optimal water conditions with soft, slightly acidic water and provide plenty of fine-leaved plants or spawning mops. Once spawning occurs, it is advisable to remove the adults from the breeding tank to prevent them from eating the eggs. The eggs usually hatch within a few days, and the fry can be fed with infusoria or finely crushed flake food until they are large enough to accept standard fare.

Overall, the Siamese Dwarf Rasbora is an excellent choice for aquarists looking for a small, colorful, and peaceful species. Their striking appearance, gentle nature, and dynamic behavior make them a delightful addition to any well-maintained aquarium. With proper care and the right environment, they can thrive and bring a touch of vibrant beauty and lively activity to your aquatic setup.