Description
Rasbora sarawakensis, commonly known as the Sarawak Rasbora, is a small and peaceful species of freshwater fish native to the rivers and streams of Borneo. With its subtle yet striking appearance, this species has become popular in the aquarium hobby for its unique coloration and peaceful demeanor. Rasbora sarawakensis is best suited for well-planted community tanks, where it thrives in schools, contributing to a dynamic and tranquil aquarium environment. Its relatively undemanding care requirements make it an excellent choice for both beginner and intermediate aquarists.
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Features of a Rasbora sarawakensis:
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Coloration: A translucent silver body with a faint, iridescent sheen and a characteristic dark stripe running horizontally from the gill plate to the tail.
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Size: Typically grows to around 4-5 cm in length.
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Body Shape: Slim, streamlined body ideal for swift swimming.
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Fins: Transparent fins with a slight reddish tint, especially in mature fish.
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Temperament: Peaceful and social, Rasbora sarawakensis thrives in groups and gets along well with other non-aggressive species.
The Best Aquarium Size for Rasbora sarawakensis
Rasbora sarawakensis is a small fish that does well in relatively modest-sized aquariums. A minimum tank size of 60 liters is suitable for a small school of 6-8 individuals. However, larger tanks, such as 100 liters or more, are ideal for maintaining a stable environment and providing ample space for the fish to swim in a natural, stress-free manner.
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Tank Mate Compatibility for Rasbora sarawakensis
Rasbora sarawakensis is a peaceful species that gets along with a wide variety of other community fish. Compatible tank mates include:
- Neon Tetras
- Corydoras Catfish
- Guppies
- Small Rainbowfish (e.g., Melanotaenia species)
- Rummy Nose Tetras
- Otocinclus Catfish
Diet for Rasbora sarawakensis
Rasbora sarawakensis is omnivorous and enjoys a varied diet. In captivity, provide a high-quality flake or pellet food designed for small community fish. Supplement their diet with live or frozen foods like daphnia, brine shrimp, and bloodworms. Offering occasional vegetable matter, such as blanched spinach or spirulina-based foods, will promote optimal health and coloration.
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Aquarium Setup for Rasbora sarawakensis
Aquarium Filtration
Rasbora sarawakensis prefers clean, well-oxygenated water. Use an efficient filtration system to ensure the water remains free of harmful toxins. A hang-on-back or canister filter works well for maintaining water clarity, as this species thrives in stable, high-quality water conditions.
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Aquarium Plants
Rasbora sarawakensis benefits from a well-planted aquarium. Plants such as Java Fern, Anubias, and Cryptocoryne provide hiding spots, contribute to water quality, and offer a natural environment. Dense plant growth will help mimic the species’ natural habitat, providing both shelter and visual appeal.
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Aquarium Lighting
Moderate lighting is ideal for Rasbora sarawakensis. A 10-12 hour light cycle will support plant growth and create a peaceful ambiance. LED lights with a daylight spectrum can provide energy-efficient illumination without stressing the fish. Dim lighting can also be beneficial for these somewhat shy fish.
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Aquarium Heating
Rasbora sarawakensis prefers a stable water temperature between 24-28°C, which mirrors its native tropical environment. Use a reliable aquarium heater with a built-in thermostat to maintain consistent temperature conditions, ensuring the fish remain comfortable and active.
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Aquarium Substrate
The substrate for Rasbora sarawakensis can be fine sand or small gravel, mimicking the soft-bottomed streams and rivers of Borneo. Avoid sharp or large gravel that could damage the fish. A fine substrate also encourages natural foraging behaviors, which is beneficial for the health of the fish.
A variety of Substrates are available at Coburg Aquarium.
Aquarium Decorations
Rasbora sarawakensis appreciates a tank with plenty of hiding spaces and swimming areas. Rocks, driftwood, and caves can provide shelter, especially if the tank is stocked with other species. Ensure there are areas of open swimming space for the fish to school and exhibit natural behaviors.
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