Description
Nothobranchius rachovii (Rachov’s Killifish / Bluefin Notho)
The Nothobranchius rachovii is often considered one of the most beautiful freshwater fish in the world. Males display breathtaking colors, with electric-blue bodies patterned in red-orange and gold, complemented by striking blue fins. Females are less colorful but still elegant, making the males’ display even more vibrant in contrast. This species is highly sought after by aquarists for its dazzling appearance and unique natural history.
Native to seasonal pools and floodplains of Mozambique and nearby regions in East Africa, N. rachovii is an annual killifish. In the wild, they live only during the rainy season, with their eggs surviving in the substrate until waters return. In captivity, they can be bred by collecting eggs from peat or fine substrate, making them a fascinating choice for hobbyists interested in both beauty and biology.
Quick Facts:
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Scientific Name: Nothobranchius rachovii
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Common Names: Rachov’s Killifish, Bluefin Notho
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Origin: Mozambique, East Africa (temporary pools and floodplains)
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Max Size: ~2.5 inches
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Temperament: Peaceful, best in species-only or with very gentle tank mates
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Diet: Carnivorous – prefers live/frozen foods (brine shrimp, mosquito larvae, daphnia, bloodworms)
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Tank Size: 10+ gallons (species-only setups recommended)
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Water Parameters:
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Temperature: 22–26°C (72–79°F)
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pH: 6.0–7.2
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Hardness: Soft water preferred (1–8 dGH)
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Lifespan: 1–1.5 years (annual species with short natural lifespan)
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Experience Level: Intermediate to advanced (specialized care and breeding required)
Why Choose Nothobranchius rachovii?
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One of the most colorful freshwater fish available
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A fascinating annual species with unique breeding behavior
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Ideal for aquarists seeking rare and eye-catching fish
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A true centerpiece for a dedicated nano or species tank
