The Nothobranchius rubripinnis is a vividly colored annual killifish species native to the seasonal floodplains of East Africa, particularly Tanzania. As its name suggests, it’s easily identified by its brilliant red fins, contrasting with an iridescent blue-green body, especially in males. Females are more modest in appearance but equally important for breeding success.

Growing to just 3–4cm, this species is a favorite among dedicated killifish keepers and breeders who appreciate its short yet dramatic life cycle. In the wild, N. rubripinnis is adapted to ephemeral pools, completing its life cycle in just a few months—making it an ideal candidate for controlled breeding projects and conservation setups.

🐠 Key Features:

• Scientific Name: Nothobranchius rubripinnis

• Common Name: Redfin Nothobranch

• Size: 3–4cm (adult)

• Lifespan: 3–12 months (annual species)

• Temperament: Peaceful, focused on reproduction

• Difficulty Level: Moderate to Advanced

• Origin: Tanzania (East African temporary pools)

• Best kept in species-only breeding tanks

🌊 Water Conditions

N. rubripinnis thrives in warm, soft water with minimal current. A simple, natural setup mimics their native conditions best.

• Temperature: 22–26°C (72–79°F)

• pH: 6.0–7.0

• Hardness: 1–8 dGH

• Tank Size: 10+ gallons for breeding groups

• Water Type: Freshwater

• Filtration: Sponge filter or gentle flow

• Lighting: Low to moderate (prefer shaded environments)

Use peat moss or coconut fiber substrate to support egg laying, and include some moss or spawning mops for comfort and natural behavior.

🐟 Tank Mates

This species is best kept in species-only setups, especially due to its short life cycle and focus on reproduction.

Not recommended with:

• Community tank species

• Fin-nippers

• Shrimp or slow feeders

Due to their annual nature, these fish do best in dedicated tanks where egg collection and incubation are the focus.

🍽️ Feeding Habits

Nothobranchius rubripinnis are micropredators, thriving on high-protein live and frozen foods that mimic their natural insect diet.

Preferred diet includes:

• Baby brine shrimp (live or frozen)

• Daphnia

• Microworms or grindal worms

• Frozen bloodworms and cyclops

• Optional: High-quality micro pellets

Feed once or twice daily, offering small, protein-rich meals to support their rapid growth and breeding.

🧼 Care and Breeding Notes

As true annual killifish, N. rubripinnis reproduces quickly and dramatically—often within weeks of reaching maturity.

✅ Breeding method:

• Provide a container or section of peat moss substrate

• Collect eggs weekly and store slightly dried in an airtight container

• Incubate at room temperature for 2–3 months (depending on temp/humidity)

• Re-wet in a shallow tank to hatch fry

• Feed fry immediately with infusoria, vinegar eels, or baby brine shrimp

Maintain regular water changes (20–30%) and monitor for signs of aging, as the species has a naturally short life.

🌿 Why Choose Nothobranchius rubripinnis?

The Nothobranchius rubripinnis is a rare gem in the world of freshwater fish—vibrant, short-lived, and incredibly rewarding to breed. Its deep red fins, fast life cycle, and adaptability to seasonal environments make it an exciting challenge for killifish enthusiasts.

Dive into the fascinating world of annual killifish—bring home Nothobranchius rubripinnis and witness nature’s rush in real time!