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The Harlequin Rasbora (Rasbora heteromorpha) is a powerhouse addition to any freshwater community or planted aquarium, blending high-impact aesthetics with essential utility. Featuring a striking metallic copper-pink body accented by a signature black triangular "wedge" on its posterior, this active schooler is a master of the "dither fish" era of fish keeping—serving as a natural biological indicator of a stable environment. It is a dedicated middle-water dweller, making it a functional cornerstone of a healthy freshwater ecosystem.
This hardy rasbora thrives in established systems with dense vegetation and slightly acidic water conditions. While generally peaceful and plant-safe, its social nature means it is best kept in schools of six to ten or more to ensure it feels secure and displays its most vivid, shimmering contrast. To ensure long-term health, provide a varied diet of high-quality flakes, micro-pellets, and occasional treats of frozen daphnia or brine shrimp. Ensure your aquarium features a darker substrate and plenty of swimming room, as these conditions help the fish maintain their deep, saturated coloration.
Note: Images shown are stock images and not the actual fish you will receive.
Care Level: Easy
Temperament: Peaceful
Minimum Tank Size: 10–20 Gallons
Diet: Omnivore
Plant Compatible: Yes
Max Size: 1.75–2 Inches
Water Conditions: 72 to 81°F, KH 2 to 10, pH 6.0 to 7.5
The Harlequin Rasbora is a strategic choice for hobbyists looking for "unmatched reliability" and visual cohesion. Its specialized triangular marking adds a layer of graphic depth to the mid-water column that pairs exceptionally well with the textures of mosses and fine-leafed plants. In the context of modern aquascaping, it is widely considered an essential "beginner-friendly schooler" for adding both warmth and kinetic energy to a display. For maximum success, provide an environment with moderate water flow and stable water parameters to facilitate its natural confidence and social vitality.
We’ve dialed in the logistics for national Overnight Delivery to ensure your livestock arrives in peak condition. Every order is packed using professional-grade insulation and climate-contingent heat or ice packs, designed to maintain stable temperatures throughout the journey. We handle the technical side of the move so you can focus on the acclimation. Our protocol is built on getting these fish from the facility to your tank with zero compromise on health or vitality.
The Harlequin Rasbora (Rasbora heteromorpha) is a powerhouse addition to any freshwater community or planted aquarium, blending high-impact aesthetics with essential utility. Featuring a striking metallic copper-pink body accented by a signature black triangular "wedge" on its posterior, this active schooler is a master of the "dither fish" era of fish keeping—serving as a natural biological indicator of a stable environment. It is a dedicated middle-water dweller, making it a functional cornerstone of a healthy freshwater ecosystem.
This hardy rasbora thrives in established systems with dense vegetation and slightly acidic water conditions. While generally peaceful and plant-safe, its social nature means it is best kept in schools of six to ten or more to ensure it feels secure and displays its most vivid, shimmering contrast. To ensure long-term health, provide a varied diet of high-quality flakes, micro-pellets, and occasional treats of frozen daphnia or brine shrimp. Ensure your aquarium features a darker substrate and plenty of swimming room, as these conditions help the fish maintain their deep, saturated coloration.
Note: Images shown are stock images and not the actual fish you will receive.
Care Level: Easy
Temperament: Peaceful
Minimum Tank Size: 10–20 Gallons
Diet: Omnivore
Plant Compatible: Yes
Max Size: 1.75–2 Inches
Water Conditions: 72 to 81°F, KH 2 to 10, pH 6.0 to 7.5
The Harlequin Rasbora is a strategic choice for hobbyists looking for "unmatched reliability" and visual cohesion. Its specialized triangular marking adds a layer of graphic depth to the mid-water column that pairs exceptionally well with the textures of mosses and fine-leafed plants. In the context of modern aquascaping, it is widely considered an essential "beginner-friendly schooler" for adding both warmth and kinetic energy to a display. For maximum success, provide an environment with moderate water flow and stable water parameters to facilitate its natural confidence and social vitality.
We’ve dialed in the logistics for national Overnight Delivery to ensure your livestock arrives in peak condition. Every order is packed using professional-grade insulation and climate-contingent heat or ice packs, designed to maintain stable temperatures throughout the journey. We handle the technical side of the move so you can focus on the acclimation. Our protocol is built on getting these fish from the facility to your tank with zero compromise on health or vitality.
