The Nothobranchius patrizii is a rare and fascinating species of annual killifish endemic to Somalia and Kenya in East Africa. Known for its metallic scales, deep red fins, and distinct vertical barring or speckled body, N. patrizii is a gem among killifish keepers. Growing to around 3–4cm, this small species thrives in temporary pools in the wild and completes its entire life cycle—from hatching to breeding—in just a few months.

In the aquarium, this fish offers a beautiful mix of color, motion, and biological intrigue, making it a favorite among advanced aquarists and those interested in annual breeding cycles. With its peaceful demeanor and compact size, it’s ideal for species-only nano tanks and killifish conservation projects.

🐠 Key Features:

• Scientific Name: Nothobranchius patrizii

• Common Name: Patrizii Killifish

• Size: 3–4cm

• Lifespan: 4–10 months (typical of annual killifish)

• Temperament: Peaceful, slow-moving

• Difficulty Level: Moderate to Advanced

• Origin: Somalia, Kenya (East Africa)

• Best suited for species-dedicated or breeding tanks

🌊 Water Conditions

As with other Nothobranchius, N. patrizii thrives in warm, soft, slightly acidic water that mimics its natural floodplain habitat.

• Temperature: 22–26°C (72–79°F)

• pH: 6.0–7.0

• Hardness: 1–6 dGH

• Tank Size: 10 gallons or more

• Water Type: Freshwater

• Filtration: Sponge filter or gentle flow

• Lighting: Low to moderate (floating plants help reduce light intensity)

Use a peat-based substrate or spawning container to facilitate natural breeding behavior and egg deposition.

🐟 Tank Mates

Due to their short lifespan and specific environmental needs, Nothobranchius patrizii should be housed in species-only tanks.

Not recommended with:

• Fast or aggressive fish

• Bottom dwellers that disturb the substrate

• Shrimp or inverts that could be eaten or cause stress

They do best in peaceful, stable environments designed around their breeding needs.

🍽️ Feeding Habits

N. patrizii are active micropredators, requiring a protein-rich diet to support their rapid development.

Ideal diet includes:

• Live baby brine shrimp

• Daphnia, microworms

• Grindal worms, vinegar eels

• Frozen bloodworms, cyclops

• Soft micro pellets (optional)

Feed 1–2 times daily, adjusting portions to avoid water quality issues.

🧼 Care and Breeding Tips

As an annual killifish, Nothobranchius patrizii lays eggs that undergo a dry period before hatching. This makes it an exciting project for aquarists interested in fish breeding cycles.

✅ Breeding process:

1. Provide peat moss substrate or spawning trays

2. Allow adults to spawn over 2–3 weeks

3. Remove and dry substrate in a sealed bag for 6–10 weeks

4. Re-wet in a shallow tank to hatch fry

5. Feed fry infusoria or baby brine shrimp from day one

Perform regular water changes (20–30%), and ensure tanks are well-covered, as this species can jump.

🌿 Why Choose Nothobranchius patrizii?

The Nothobranchius patrizii offers aquarists a unique chance to witness one of nature’s most remarkable reproductive strategies in a compact, peaceful, and visually striking fish. Its rarity, combined with a vivid life cycle and stunning appearance, makes it a rewarding addition for hobbyists and breeders alike.

Celebrate the beauty of ephemeral life—add Nothobranchius patrizii to your aquarium today!