Blue OB Masinje Zebra Mbuna (Maylandia zebra)

Blue OB Masinje Zebra Mbuna (Maylandia zebra) is a Lake Malawi rock-dwelling cichlid sold under the supplier’s Blue OB Masinje trade form. “OB” refers to the blotched colour pattern seen in aquarium strains and locality forms; individual fish can differ noticeably in the balance of blue, darker blotches and background colour.

This listing has several supplied-size variants. Choose the size shown in the live variant selector; the selected variant is the authority for the fish being ordered. The listing does not guarantee sex or an exact blotch pattern unless a variant explicitly states it.

What you are buying

• Scientific name: Maylandia zebra
• Trade form: Blue OB Masinje Zebra Mbuna
• Synonym seen in aquarium literature: Metriaclima zebra
• Origin: Lake Malawi cichlid lineage / supplier locality-form naming
• Adult planning size: roughly 10–12 cm for a typical zebra mbuna, with individual variation
• Temperament: territorial and assertive
• Diet: aufwuchs-grazing omnivore with a strong plant/algae component
• Care level: intermediate

Colour, pattern and identity

Zebra mbuna are highly variable across populations and domestic aquarium lines. The “Blue OB Masinje” wording identifies the supplier/trade form rather than promising that every fish will show an identical pattern. Juveniles can change considerably as they mature, and colour is also influenced by sex, hierarchy, stress and lighting.

For that reason, use the gallery as a representative identification aid rather than a guarantee of the exact dispatched fish. Scientific naming for the zebra complex has also changed in the literature; Maylandia zebra is used here, while Metriaclima zebra remains a familiar alternative name in older and hobby sources.

Aquarium setup

Keep this fish in a mature Lake Malawi-style aquarium with hard, alkaline water, strong biological filtration and extensive rockwork. A practical house starting point is around 200 litres or larger for a managed mbuna community, with a long footprint preferred over a tall narrow aquarium.

Build multiple stable rock piles, caves and broken sight lines so fish can establish territories without seeing every other fish continuously. Leave open water for feeding and movement. Place heavy rockwork securely on the aquarium base before adding substrate so digging cannot undermine it.

Water parameters

A stable range around 24–28°C and pH 7.5–8.5 suits a typical Malawi mbuna setup, with moderate to hard mineral content. Test your actual source water before adjusting chemistry. Ammonia and nitrite should remain at zero in a fully cycled aquarium.

Good oxygenation matters. Mbuna aquariums often carry a substantial bioload, so use filtration with enough biological capacity and maintain water quality with regular measured water changes rather than depending on one fixed schedule.

Feeding

Zebra mbuna spend much of their natural activity grazing algae-rich aufwuchs and associated small organisms from rock surfaces. In captivity, use a quality Malawi/mbuna food or herbivore-leaning cichlid pellet as the staple, with spirulina and other plant/algal ingredients forming a meaningful part of the diet.

Small amounts of suitable invertebrate protein can be included for variety, but rich meaty foods should not dominate. Overfeeding high-energy foods is unnecessary and can contribute to digestive problems and poor water quality.

Behaviour and stocking

This is a territorial cichlid, not a peaceful schooling fish. The safest stocking pattern depends on sex, tank length, rockwork and the other mbuna present. A pair is not automatically an ideal social unit, and unsexed juveniles should not be purchased on the assumption that a desired male-to-female ratio is guaranteed.

Watch for persistent chasing, a fish being trapped behind equipment, refusal to feed or repeated fin damage. Those are signs that the social structure or available territory needs attention.

Tank mates

Choose robust Lake Malawi cichlids with similar water requirements and comparable confidence. Avoid small community fish, delicate long-finned species and soft-water fish. Peacocks and haps can sometimes share large mixed Malawi aquariums, but their feeding style and lower aggression often require more careful planning than a simple “Malawi fish” label suggests.

Before ordering

Choose Blue OB Masinje Zebra Mbuna if you are deliberately building a rocky, hard-water African cichlid aquarium and can manage territorial behaviour. Reconsider if the tank is newly cycled, soft/acidic, very small or intended as a calm mixed community.

Use the live Shopify variant for current size, price and availability. This page deliberately avoids fixed prices and unrelated search phrases so the information that Google, Shop and AI systems extract remains about the actual fish.