Bluefin Notho Killifish

Bluefin Notho Killifish (Nothobranchius rachovii)

The Bluefin Notho, also known as Bluefin Nothobranch and Rachov's Notho, is a stunning, colorful killifish that captivates aquarists with its vibrant hues and fascinating behavior. Males display striking blue, red, and yellow patterns, while females are more subdued with brownish-gray coloration. These fish are known for their short lifespans and unique breeding habits.

The Bluefin Notho adds vibrancy and activity to the aquarium but is ideally suited for a species-specific tank only. They do best when kept in groups of three, with a ratio of one male for every two females to reduce aggression. If multiple males are housed together, ensure ample space, well-planted and abundant caves for retreating in case of conflict. They grow to about 2.5 inches in size. Male Bluefin Nothos can be quite territorial during spawning periods. It's important to provide ample hiding spaces for females.

Compatible tank mates include pencilfish, Corydoras catfish, and Sparkling or Croaking Gouramis, which all thrive in similar soft water conditions. However, Bluefin Nothos are not suitable for general community tanks.

Bluefin Nothos are carnivorous, primarily feeding on small live or frozen foods such as brine shrimp, daphnia, and bloodworms. A varied diet will help maintain their vibrant colors and overall health.

Providing a suitable habitat for Bluefin Nothos requires a densely planted aquarium with floating plants, and plenty of bogwood is recommended. Incorporating botanicals like Catappa leaves can help maintain soft, acidic water that closely resembles its natural habitat. Use darker substrate in the tank, along with dense plantings, caves, driftwood, and pieces of wood for hiding and cover. Floating plants can be added to diffuse light further and create a more natural environment.

Efficient filtration is crucial, but water movement should be gentle. Regular, small water changes are important to maintain water quality.
A minimum aquarium size of 20 gallons is recommended for a single pair, with 40 gallons or larger ideal for a breeding setup. The water should have a pH of 6.0-7.0, a hardness of 2-12 dGH, and a temperature of 68-77°F (20-25°C).

A secure, tight-fitting cover is necessary, as these fish are skilled jumpers.