Nothobranchius foerschi 3-4cm

Nothobranchius foerschi (3–4cm) is a rare Tanzanian killifish with fiery red fins and iridescent scales—perfect for species tanks and annual fish breeders.

The Nothobranchius foerschi is a breathtaking annual killifish species from southern Tanzania, admired for its fiery red-orange fins, iridescent blue-green body, and detailed spotted or reticulated patterns. Growing to a compact 3–4cm, this species is perfect for species-only setups, seasonal tanks, or killifish enthusiasts interested in rare and visually striking fish.

Named in honor of German aquarist Willi Foersch, N. foerschi is a jewel of the genus—peaceful, fascinating to breed, and rewarding for aquarists who want to explore nature’s dry-season survival strategy. Like all Nothobranchius, this species completes its entire life cycle in a matter of months in temporary African pools, making it ideal for controlled breeding and incubation projects.

🐠 Key Features:

• Scientific Name: Nothobranchius foerschi

• Common Name: Foersch’s Killifish

• Size: 3–4cm (adult)

• Lifespan: 4–10 months (longer in cool, stable aquariums)

• Temperament: Peaceful, focused on spawning

• Difficulty Level: Intermediate to Advanced

• Origin: Southern Tanzania

• Ideal for species-only tanks and dedicated breeders

🌊 Water Conditions

To replicate their natural habitat, N. foerschi needs warm, soft, slightly acidic water and a calm, shaded tank environment.

• Temperature: 22–26°C (72–79°F)

• pH: 6.0–7.2

• Hardness: 1–8 dGH

• Tank Size: Minimum 10 gallons

• Water Type: Freshwater (blackwater conditions ideal)

• Filtration: Sponge filter or low-flow system

• Lighting: Low to moderate (floating plants or tannins recommended)

Peat moss or coconut fiber substrate is essential for encouraging egg-laying and successful breeding.

🐟 Tank Mates

Because of their short lifespan and breeding needs, N. foerschi are best kept alone or in species-dedicated tanks.

Avoid:

• Aggressive or fast-moving fish

• Shrimp and other invertebrates (may be eaten)

• Bottom dwellers that disturb the substrate

Housing a pair or trio (1 male + 2 females) works best for breeding and maintaining social harmony.

🍽️ Feeding Habits

N. foerschi is a micropredator that thrives on small, protein-rich foods.

Diet includes:

• Live or frozen baby brine shrimp

• Daphnia, microworms, grindal worms

• Frozen bloodworms and cyclops

• High-protein micro pellets (optional)

Feed 1–2 times daily, offering manageable portions to avoid overfeeding in small tanks.

🧼 Care and Breeding Tips

Nothobranchius foerschi follows the classic annual killifish life cycle, laying eggs that must dry before hatching. This makes them a favorite among hobbyist breeders.

✅ Breeding guide:

1. Add peat moss or coco fiber for spawning

2. Let adults spawn for 2–3 weeks

3. Remove and store peat substrate in a sealed plastic bag

4. Incubate dry for 6–10 weeks

5. Re-wet substrate to trigger hatching

6. Feed newly hatched fry with infusoria or baby brine shrimp

Change water weekly (20–30%), and keep the tank tightly covered, as killifish are known to jump.

🌿 Why Choose Nothobranchius foerschi?

Nothobranchius foerschi offers a blend of rare beauty, peaceful nature, and biological fascination. With their vivid coloration and fast-paced life cycle, they’re perfect for aquarists seeking something unusual and educational, especially for small, natural-style setups or breeding projects.

Add brilliance and life to your aquarium—choose Nothobranchius foerschi today!