Bluefin Notho Killifsh

Bluefin Notho Killifish (Pair) (Nothobranchius rachovii)

The Bluefin Notho Killifish is one of the most spectacular freshwater killifish available, celebrated for the male's dazzling electric blue fins, vibrant orange-red body, and intricate turquoise patterning. Paired with the more subtly coloured female, these fascinating fish offer a beautiful display of natural behaviour and striking contrast. Their vivid colours and graceful swimming make them a true jewel in species-only and peaceful community aquariums.

Males are renowned for their intense colouration, especially during courtship, where they display flared fins and brilliant iridescence to attract females. The females feature soft silver and beige tones, providing a natural balance while allowing the male's colours to truly stand out. Watching a pair interact is one of the highlights of keeping these remarkable fish.

🌿 Why Choose Bluefin Notho Killifish?

💙 Stunning electric blue fins with brilliant metallic highlights
❤️ Vibrant red and orange body colouration on the male
🐟 Beautiful male and female pair displaying natural behaviour
✨ One of the most colourful freshwater killifish available
🌱 Ideal for heavily planted aquariums and species tanks
🧠 Fascinating courtship displays and personality
🏆 A fantastic choice for experienced aquarists looking for something unique

Bluefin Notho Killifish are native to temporary pools and seasonal floodplains in Mozambique. During the rainy season, they thrive in shallow pools rich in aquatic vegetation. As these pools dry out, the adults naturally complete their life cycle, leaving drought-resistant eggs buried in the substrate that hatch when the rains return.

📏 Care Requirements

🧬 Scientific Name: Nothobranchius rachovii
📛 Common Name: Bluefin Notho Killifish / Rachov's Killifish
🏠 Tank Size: 40L+ recommended for a pair
📏 Adult Size: Up to 5–6cm
🌡️ Temperature: 22–26°C
⚗️ pH Range: 6.5–7.5
🧘 Temperament: Peaceful, with males becoming territorial towards other males
🍽️ Diet: High-quality micro pellets, frozen bloodworm, daphnia, brine shrimp, mosquito larvae, blackworm, and live foods for optimum health and colouration
👥 Group Size: Best kept as a pair or one male with multiple females in larger aquariums

Bluefin Notho Killifish thrive in mature aquariums with gentle water flow, subdued lighting, and plenty of dense planting. Fine-leaved plants, floating vegetation, and dark substrates help them feel secure while bringing out their vibrant colours. A tight-fitting lid is essential, as killifish are accomplished jumpers.

🐠 Compatibility

Bluefin Notho Killifish are best suited to peaceful aquariums with similarly calm tank mates, including:

🐟 Ember Tetras
🐟 Chili Rasboras
🐟 Celestial Pearl Danios
🐟 Pygmy Corydoras
🐟 Otocinclus
🦐 Larger freshwater shrimp (with caution)
🐌 Peaceful freshwater snails

Avoid keeping them with aggressive fish, fin-nippers, or large species that may intimidate them. Multiple males should only be kept together in larger, well-planted aquariums with plenty of visual barriers.

Important Notes

Bluefin Notho Killifish are an annual killifish, meaning they have a naturally short lifespan of around 12–18 months. This is completely normal for the species and part of their unique life cycle in the wild.

Breeding is both fascinating and rewarding. Eggs are deposited in fine substrate or spawning mops and require a dry incubation period before hatching, mimicking the seasonal drying of their natural habitat.

Because of their specialised breeding cycle and preference for live or frozen foods, Bluefin Notho Killifish are often considered better suited to aquarists with some fishkeeping experience. Maintaining excellent water quality and offering a varied, protein-rich diet will ensure they display their full range of spectacular colours.

The Bluefin Notho Killifish is a truly exceptional choice for UK aquarists seeking a rare and breathtaking freshwater species. With the male's dazzling electric blue fins, the female's understated elegance, and their fascinating natural behaviours, a pair makes a captivating addition to well-planted aquariums and dedicated killifish collections.