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Blue johanni - Melanochromis cyaneorhabdos

Blue johanni - Melanochromis cyaneorhabdos

Scientific name: Melanochromis cyaneorhabdos

Common name: Blue johanni

Family: Cichlidae

Usual size in fish tanks: 7 - 8 cm (2.76 - 3.15 inch)


Recommended pH range for the species: 7.4 - 8.5

Recommended water hardness (dGH): 9 - 27°N (160.71 - 482.14ppm)

0°C 32°F30°C 86°F

Recommended temperature: 23 - 27 °C (73.4 - 80.6°F)

The way how these fish reproduce: Spawning

Where the species comes from: Africa

Temperament to its own species: peaceful

Temperament toward other fish species: aggressive/territorial

Usual place in the tank: Middle levels

Food and feeding

Vegetable matter should make up the major part of the diet for Blue johanni. Supply them with spirulina flake and vegetable based flakes for the staple diet but also give them treats of meaty food like blood worms and brine shrimp. Take care not to over feed these fish as they are prone to Malawi bloat.


Africa, Blue johanni’s are endemic to Lake Malawi.


When mature, males will be slightly larger than the females. The females will also have a lighter belly than the males and shorter pelvic fins


Melanochromis cyaneorhabdos are maternal mouth brooders. When the eggs have been laid and fertilised, the female will hold them in her mouth for 21 days incubation. During this time she will hide away and when the fry are released they can be fed on crushed flake and newly hatched brine shrimp.


The expected life span for Melanochromis cyaneorhabdos is 10 years.

Short description

Supply plenty of hiding places in the tank by using rock work. It is best to keep 1 male with 2-3 females but keep your eyes out for a single female being harassed by the male.


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Blue johanni picture 1 Blue johanni picture 2

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