The Nothobranchius korthausae is a stunning annual killifish species from Tanzania, prized for its intense red-orange coloration, iridescent body speckling, and calm, peaceful behavior. Growing to just 3–4cm, this species brings a fiery flash of color to species-dedicated tanks and is a fantastic choice for aquarists looking to explore seasonal breeding cycles and the unique life history of annual fish.

Males are especially striking, with bright vermilion bodies, blue highlights, and spotted or banded fins, while females are more subdued but still elegant in appearance. Like all Nothobranchius, this species is adapted to ephemeral water bodies and has a short lifespan in nature, completing its life cycle within months—though it may live longer in stable aquarium conditions.

🐠 Key Features:

• Scientific Name: Nothobranchius korthausae

• Common Name: Korthaus Killifish

• Size: 3–4cm (adult)

• Lifespan: 4–12 months (longer in cool, stable tanks)

• Temperament: Peaceful and shy

• Difficulty Level: Moderate to Advanced

• Origin: Coastal Tanzania (temporary freshwater pools)

• Ideal for species tanks or killifish breeding setups

🌊 Water Conditions

N. korthausae thrives in warm, soft, slightly acidic water with minimal current and shaded lighting.

• Temperature: 22–25°C (72–77°F)

• pH: 6.0–7.0

• Hardness: 1–8 dGH

• Tank Size: 10+ gallons

• Water Type: Freshwater

• Filtration: Sponge filter or gentle air-driven filter

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

Use peat moss or coconut fiber substrate for egg laying, and recreate blackwater conditions with botanicals like Indian almond leaves for added comfort.

🐟 Tank Mates

Nothobranchius korthausae is best kept in species-only tanks due to its calm demeanor and delicate size.

Avoid tank mates that are:

• Fast or aggressive

• Fin-nipping

• Bottom dwellers that disturb eggs

• Shrimp or small inverts (may be preyed upon)

If kept with other Nothobranchius, make sure there’s ample cover and space to reduce competition.

🍽️ Feeding Habits

As a micropredator, N. korthausae thrives on a varied, protein-rich diet to support its quick development and vibrant coloration.

Ideal foods include:

• Live or frozen baby brine shrimp

• Daphnia, microworms

• Grindal worms

• Frozen cyclops and bloodworms

• High-quality micro pellets (optional)

Feed 1–2 times daily, offering small portions that mimic their insectivorous diet in the wild.

🧼 Care and Breeding Tips

N. korthausae follows a classic annual killifish breeding cycle, making it ideal for hobbyist breeders who enjoy egg incubation techniques.

✅ Breeding instructions:

1. Provide a soft, peat-based substrate for spawning

2. Allow pair or trio to spawn for 2–3 weeks

3. Remove peat and store semi-dry in a sealed bag for 6–10 weeks

4. Re-wet in shallow fry tank to trigger hatching

5. Feed fry with infusoria, then baby brine shrimp as they grow

Maintain weekly water changes (20–30%) and keep tanks securely covered, as they are known jumpers.

🌿 Why Choose Nothobranchius korthausae?

With its brilliant red-orange color, gentle nature, and short but fascinating life cycle, Nothobranchius korthausae is perfect for aquarists seeking a rewarding, hands-on experience. Whether you're interested in annual killifish breeding or simply want a vivid centerpiece for a species-only tank, this fish delivers elegance, rarity, and natural wonder.

Bring the magic of seasonal life to your aquarium—choose Nothobranchius korthausae today!