Blue johanni
Minimum Tank Volume 42 Gallon |
Recommended Tank Volume 53 Gallon (for a male with several females) |
Maximum Adult Length 4.7 inch |
Average Adult Length 3.9 inch |
Shoaling (6+ required) No |
Preferred Water Type Hard, alkaline freshwater |
Minimum Group Size 3 |
Temperature Range (°C) 23-27 |
pH Range 7.6-8.8 |
Water Hardness (dGH) 10-25 |
Typical Lifespan (years) 10 years |
Minimum Tank Volume 42 Gallon | Recommended Tank Volume 53 Gallon (for a male with several females) |
Maximum Adult Length 4.7 inch | Average Adult Length 3.9 inch |
Shoaling (6+ required) No | Preferred Water Type Hard, alkaline freshwater |
Minimum Group Size 3 | Temperature Range (°C) 23-27 |
pH Range 7.6-8.8 | Water Hardness (dGH) 10-25 |
Typical Lifespan (years) 10 years |
Introduction
The Blue Johanni, scientifically known as Melanochromis johannii, is a vibrant freshwater cichlid native to Lake Malawi in Africa. Renowned for its striking coloration and dynamic behavior, this species has become a favorite among aquarists seeking to add a splash of color and activity to their tanks. While their care requires attention to specific water parameters and tank setups, the Blue Johanni offers a rewarding experience for those willing to meet its needs.
Care and Environment
Proper care for the Blue Johanni involves replicating its natural habitat to ensure health and vitality. A minimum tank size of 160 liters is recommended to provide ample space for swimming and territory establishment. The ideal water temperature ranges between 23°C and 27°C, with a pH level of 7.6 to 8.8, reflecting the alkaline conditions of Lake Malawi. Water hardness should be maintained between 10 to 25 dGH. Efficient filtration is crucial to maintain water quality, and moderate lighting is sufficient for this species.
What type of substrate is best for Blue Johanni?
A sandy substrate is preferred, as it mimics their natural environment and allows for natural behaviors such as digging.
How should the tank be decorated to suit Blue Johanni?
Incorporate plenty of rocks and caves to provide hiding spots and establish territories, which can help reduce aggression among tank mates.
What should be included in the Blue Johanni's diet?
They are omnivorous and thrive on a diet rich in vegetable matter, such as spirulina flakes and blanched spinach, supplemented with live or frozen foods like brine shrimp.
Origin and Habitat
Where is the Blue Johanni naturally found?
The Blue Johanni is endemic to Lake Malawi, specifically around Masinje Rocks and Cape Ngombo.
What type of environment does the Blue Johanni inhabit in the wild?
They typically reside in shallow, rocky coastal areas of the lake, where they navigate through crevices and caves.
Temperament and Compatibility
Is the Blue Johanni aggressive?
Yes, they exhibit territorial and aggressive behaviors, especially among males.
Can multiple Blue Johanni males be kept together?
It's advisable to keep only one male with several females to minimize aggression.
What are suitable tank mates for Blue Johanni?
They can coexist with similarly sized and temperamented mbuna cichlids but should not be housed with less aggressive species to prevent bullying.
Interesting Facts
What is unique about the coloration of Blue Johanni?
Males display a striking blue-black coloration with bright blue striping, while females and juveniles are yellow-orange, showcasing clear sexual dimorphism.
How do Blue Johanni reproduce?
They are maternal mouthbrooders; females carry fertilized eggs in their mouths until the fry are ready to swim freely.
What is the lifespan of a Blue Johanni in captivity?
With proper care, they can live up to 10 years, providing long-term enjoyment for aquarists.
Sources
All information in this article has been gathered from the following reputable sources: