Dwarf Rasbora: Fish Species Profile

Characteristics

• Scientific Name: Boraras maculatus
• Family: Cyprinidae
• Origin: Southeast Asia, particularly Malaysia, Singapore, and Indonesia
• Social Behavior: Peaceful, schooling fish
• Tank Level: Middle to upper regions
• Minimum Tank Size: 5 gallons
• Diet: Carnivore
• Breeding Method: Egg layer
• Care Level: Intermediate
• Preferred pH Range: 4.5 to 6.5
• Water Hardness: Up to 5 dGH
• Temperature Range: 75 to 79°F (24 to 26°C)

Origin and Distribution

Dwarf rasboras are native to the slow-moving blackwater streams and peat swamps of Southeast Asia, particularly in Malaysia, Singapore, and Indonesia. These environments are characterized by soft, acidic waters rich in tannins from decaying organic matter, providing a unique habitat for these small fish.

Colors and Markings

Dwarf rasboras exhibit a vibrant reddish-orange hue with distinctive black spots along their bodies. A prominent black spot is typically present near the base of the tail, with additional smaller spots along the midline. Their fins are often translucent with subtle red or orange tints, adding to their delicate appearance.

Tankmates

Due to their small size and peaceful nature, dwarf rasboras are best kept with similarly sized, non-aggressive species. Suitable tankmates include:

• Small tetras
• Other small rasboras
• Dwarf shrimp
• Pygmy corydoras

It’s advisable to avoid housing them with larger or more boisterous fish that may outcompete them for food or view them as prey.

Care

Dwarf rasboras thrive in well-planted aquariums that mimic their natural habitat. Key care considerations include:

• Tank Setup: Provide dense vegetation, driftwood, and leaf litter to create hiding spots and simulate blackwater conditions.
• Water Parameters: Maintain soft, acidic water with stable parameters. Regular water changes are essential to keep water quality high.
• Lighting: Subdued lighting is preferred, as bright lights can cause stress.
• Group Size: Keep them in groups of at least eight to promote natural schooling behavior and reduce stress.

Diet and Feeding

As carnivores, dwarf rasboras prefer a diet of small live or frozen foods. Suitable options include:

• Daphnia
• Baby brine shrimp
• Microworms

They may also accept high-quality micro-pellets or finely crushed flakes. Feed them small amounts multiple times a day, ensuring they consume all the food within a few minutes to prevent overfeeding and maintain water quality.

Gender Differences

Males are generally more slender and exhibit brighter coloration compared to females. Females tend to be slightly larger with a rounder abdomen, especially when carrying eggs.

Breeding

Breeding dwarf rasboras in captivity is achievable with proper conditions:

• Breeding Tank: Set up a separate tank with soft, acidic water and a temperature around 79°F (26°C). Provide fine-leaved plants or spawning mops for egg deposition.
• Spawning: Condition the breeding pair with high-quality live or frozen foods. The female will scatter eggs among the plants, and the male will fertilize them.
• Post-Spawning: Remove the adults after spawning to prevent them from eating the eggs. Eggs typically hatch within 24 to 36 hours.
• Fry Care: Feed the fry infusoria or commercially available liquid fry food until they are large enough to accept finely crushed flake food or baby brine shrimp.

Further Research

For more detailed information on dwarf rasbora care, breeding techniques, and tank setups, consider exploring specialized aquarium literature or consulting with experienced aquarists.

FAQ

How many dwarf rasboras should I keep together? It’s recommended to keep them in groups of at least eight to promote natural schooling behavior and reduce stress.

Are dwarf rasboras suitable for beginners? While they are relatively hardy, their sensitivity to water parameter fluctuations makes them more suitable for aquarists with some experience.

Can dwarf rasboras live with betta fish? Due to their small size, they may be at risk of being perceived as prey by bettas. It’s advisable to avoid this combination.

This profile provides an overview of dwarf rasboras, highlighting their care requirements and characteristics to assist aquarists in maintaining a healthy and vibrant aquarium.