The Red Cherry Rasbora, scientifically known as Rasbora lacrimula, is a slender, active species of rasbora native to the Mahakam River drainage in East Kalimantan, Borneo, Indonesia. It inhabits slow-moving blackwater streams and flooded forest areas with soft, acidic water and dense submerged vegetation. While not widely seen in the aquarium trade, it is prized by specialists for its striking coloration and peaceful, schooling behavior. Adult Red Cherry Rasboras typically reach about 1.2 to 1.6 inches (3 to 4 cm) in length. They have an elongated, silvery body with a pronounced stripe running laterally from the gill cover to the base of the caudal fin. A distinct teardrop-shaped black spot marks the caudal peduncle. The fins are mostly translucent with orange and reddish accents, especially in males, while females are slightly rounder and less intensely colored. A tank of at least 15 to 20 gallons is ideal for a small group. As a true shoaling species, they should be kept in groups of eight or more to reduce stress and bring out natural behaviors. The aquarium should include fine-leaved or floating plants, driftwood, and leaf litter to simulate their native habitat. Subdued lighting or tinted water from botanicals will help accentuate their colors and provide security. Water parameters should include a temperature of 73 to 79°F (23 to 26°C), a pH between 5.5 and 7.0, and soft to moderately hard water. They are sensitive to poor water quality, so regular maintenance and gentle filtration are necessary for long-term health. Feeding Rasbora lacrimula is easy, as they accept a wide range of finely sized foods. Offer high-quality micro pellets, crushed flakes, and live or frozen fare such as daphnia, baby brine shrimp, or cyclops. Their small mouths require appropriately sized food particles. Red Cherry Rasboras are peaceful and do well with other small, gentle fish such as micro-rasboras, small tetras, pygmy Corydoras, and peaceful dwarf gouramis. Avoid keeping them with larger or aggressive species. Breeding in captivity is possible but rarely attempted. They are typical egg-scattering rasboras, showing no parental care. To breed them, use a separate tank with soft, acidic water, spawning mops, and dense plants. Remove adults after eggs are laid to prevent predation. Rasbora lacrimula (Red Cherry Rasbora) is a beautiful, peaceful schooling fish that adds vibrant color and active motion to blackwater and softwater community aquariums.
