Rachov's killifish

Nothobranchius rachovii

Wild range: Mozambique (Africa)

At a glance: Rachov's killifish care

Compiled reference information. Review the care notes and original sources below.

What temperature is listed for Rachov's killifish?

The compiled profile lists 20.0–22.0 °C for Rachov's killifish (Nothobranchius rachovii). Check the original sources below for context and differing recommendations.

What tank size is listed for Rachov's killifish?

The profile lists a minimum tank volume of 10.0 US gallons (40.0 liters). Volume alone does not establish suitability; consider dimensions, group size and other inhabitants alongside the full care notes.

What pH is listed for Rachov's killifish?

The compiled profile lists a pH of 5.5–7.0. Review the cited care sources alongside the other water parameters in this profile.

Natural habitat

Nothobranchius rachovii inhabits seasonal pools and temporary water bodies in Mozambique, particularly in the lower Zambezi and lower Pungwe River systems. The species thrives during the rainy season when these water bodies are filled, leading to a rapid life cycle. They possess a unique adaptation to survive droughts by laying eggs in mud, which remain dormant until wet conditions return.

Where they are found

This species is endemic to Mozambique, primarily found in shallow, stagnant waters where the water flow is minimal or absent. They rely heavily on the seasonal rains for their life cycle, making them tied to specific environmental conditions.

Aquarium care

To adequately care for Nothobranchius rachovii, a tank of at least 10 gallons (40 liters) is recommended for a male and 2-3 females, with stable water parameters to reduce stress. Regular water quality testing is essential to maintain optimal conditions. Use minimal filtration for low water flow and provide ample hiding spaces with decorations and plants.

Feeding

Nothobranchius rachovii is an omnivore and readily accepts a variety of foods including live and frozen options like brine shrimp, daphnia, and bloodworms. A high-protein diet is ideal, and feeding should occur twice daily. Proper care should be taken to avoid overfeeding, utilizing a five-minute rule to ensure they consume food promptly.

Compatibility

Due to their territorial nature, especially in males, it's recommended to house Nothobranchius rachovii in species-specific setups or with small, non-aggressive tank mates. While peaceful towards females and smaller species, larger or more aggressive fish may provoke stress and territorial disputes.

Breeding

Breeding requires replicating their natural seasonal cycle. Condition them with live food and alter tank conditions to induce spawning. Females can lay several eggs daily, which must be collected and dried correctly after spawning to ensure the embryos survive until the next rainy season.

Sources

Compiled from multiple independent care sheets — not copied from a single site.