The Cobalt Blue Zebra (Maylandia callainos, formerly Pseudotropheus callainos) is a bold and beautiful Mbuna cichlid from the rocky shorelines of Lake Malawi. Known for its intense cobalt-blue colouring and stocky build, this species is a favourite among aquarists looking to create vibrant African cichlid aquariums. While visually stunning, the Cobalt Blue Zebra is territorial and best kept in well-structured setups with tank mates that can handle its assertive behaviour.

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Features of the Cobalt Blue Zebra

• Grows up to 1215 cm in length

• Brilliant cobalt-blue body with subtle vertical barring (males are typically more vivid)

• Females may display a paler blue or bluish-white tone

• Robust Mbuna with a confident, active personality

• Territorial and aggressive, especially during breeding periods

The Best Aquarium Size for Cobalt Blue Zebra
A minimum tank size of 200 litres is recommended to accommodate their territorial nature. A longer tank footprint with ample rock formations allows for clear territory boundaries and helps reduce aggression. Overcrowding with compatible species can also disperse territorial focus.

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Tank Mate Compatibility for Cobalt Blue Zebra
This species should be kept with other similarly tempered Mbuna or Lake Malawi cichlids that can defend themselves. Suitable companions include:

• Yellow Lab Cichlid (Labidochromis caeruleus)

• Red Zebra Cichlid (Maylandia estherae)

• Acei Cichlid (Pseudotropheus acei)

• Labeotropheus fuelleborni

• Socolofi Cichlid (Pseudotropheus socolofi)

Avoid housing with peaceful community fish or overly aggressive predator species.

Diet for Cobalt Blue Zebra
A primarily herbivorous diet is best. Feed high-quality spirulina flakes or pellets, algae wafers, and blanched vegetables such as spinach and zucchini. Avoid high-protein foods like bloodworms, which can lead to digestive issues common in Mbuna.

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Aquarium Setup for Cobalt Blue Zebra

Aquarium Filtration
Strong filtration is essential to manage the bio-load of active cichlids and maintain pristine water quality.

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Aquarium Plants
Most rooted plants may be uprooted or damaged. If plants are desired, use hardy species like Anubias or Java Fern attached to rocks or use realistic artificial plants.

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Aquarium Lighting
Moderate lighting enhances their vibrant blue coloration without adding stress.

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Aquarium Heating
Maintain a stable water temperature between 24C and 28C, ideal for Lake Malawi species.

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Aquarium Substrate
Fine sand or smooth gravel supports natural digging behaviour and mimics their native environment.

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Aquarium Decorations
Provide extensive rockwork with caves, crevices, and hiding places to define territories and reduce aggression. Use inert rocks such as limestone or lava rock to help buffer the pH and maintain the hard, alkaline water conditions preferred by Mbuna cichlids.

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