Overview
The Rachow's Notho (Nothobranchius rachovii) is a freshwater fish belonging to the family Nothobranchiidae. It thrives at temperatures of 20–24 °C with a pH of 6.0–7.5, and requires a minimum tank volume of 40 litres. Known for its peaceful killifish; keep males separately or in ratio of 1 male to 2+ females, it is considered a intermediate-level species. Annual killifish — their entire life cycle completes in one rainy season; eggs survive the dry season in mud. Water changes of 25–30 % weekly, stable parameters, and appropriate tank mates are key to long-term success with this species.
Scientific Classification
| Rank | Classification |
|---|---|
| Family | Nothobranchiidae |
| Genus | Nothobranchius |
| Species | Nothobranchius rachovii |
| Water type | freshwater |
| Native range | Africa|Afrotropical |
Natural Habitat
Nothobranchius rachovii originates from Africa|Afrotropical. It inhabits freshwater environments and is adapted to the water conditions found in its native range.
Appearance
Adults reach 5–6 cm in length. The body is freshwater and the species displays characteristic coloration suited to its environment.
Behavior
This species is described as a peaceful killifish; keep males separately or in ratio of 1 male to 2+ females. It does not school and can be kept individually or in small numbers. Activity level is moderate. Annual killifish — their entire life cycle completes in one rainy season; eggs survive the dry season in mud.
| Trait | Value |
|---|---|
| Temperament | peaceful killifish; keep males separately or in ratio of 1 male to 2+ females |
| Schooling | No |
| Activity level | moderate |
Water Requirements
| Parameter | Ideal Range | Notes |
|---|---|---|
| Temperature | 20–24°C (68–75°F) | Use a reliable adjustable heater |
| pH | 6–7.5 | Avoid sudden swings |
| Hardness (GH) | 5–15 dGH dGH | Soft to moderately hard |
| Ammonia | 0 ppm | Any detectable ammonia signals a problem |
| Nitrite | 0 ppm | Toxic even at low levels |
| Nitrate | <15 ppm | Manage through regular partial water changes |
| Min. tank | 40L (11 gal) | Larger tanks are easier to keep stable |
Interesting Facts
- Rachow's Notho is considered one of the most beautiful freshwater fish in the world.
- Eggs can be stored dry in peat moss for months and hatch when re-wetted — mimicking the rainy season.
- Native to seasonal pools in coastal Mozambique that dry out completely every dry season.
📋 Full Care Guide
Ready to set up a tank for your Rachow's Notho? The complete care guide covers tank setup, feeding schedule, common diseases, tank mates, and breeding.
Read Rachow's Notho Care Guide →Related Species
Related Species & Guides
This species profile was reviewed for biological accuracy and practical aquarium care guidance. For suspected illness or disease, test your water parameters first and consult an aquatic veterinarian if symptoms persist.