The Polystigma Cichlid (Nimbochromis polystigma) is a striking and predatory member of the African Cichlid group, originating from the sediment-rich and rocky waters of Lake Malawi. Renowned for its aggressive ambush-hunting behavior, this cichlid often lies motionless on the substrate, mimicking death to lure smaller fish. With its golden-olive base coloration and irregular dark blotching, it is both a visually appealing and formidable presence in a large predator-focused aquarium. Due to its size, temperament, and dietary needs, it is best suited for experienced aquarists who understand the dynamics of African predatory cichlids.
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Golden-yellow to olive body with black irregular blotches
Adult size reaches 25–30 cm
Males exhibit brighter colors during breeding
Known for feigning death to ambush prey
Powerful, fast-swimming predator
Lifespan of 8–10 years with proper care
A minimum tank size of 400 litres is required for a single adult specimen. For a group or mixed predator setup, 600 litres or more is recommended to allow adequate territory and swimming space. Long tanks with horizontal space are ideal.
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Due to its aggressive and predatory nature, compatible species should be similar in size and temperament. Ideal tank mates include:
Fossorochromis rostratus
Avoid small, peaceful, or slow-moving fish, as they are likely to be harassed or eaten.
The Polystigma is a carnivorous species that thrives on a high-protein diet:
High-quality carnivore pellets or sticks
Frozen shrimp, krill, or white fish
Live food such as earthworms or feeder fish (used sparingly)
Occasional supplementation with vitamin-enriched food for immune health
Avoid overfeeding and fatty meats to prevent water degradation and health issues.
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Strong external canister or sump filtration is required to handle the bioload. Maintain low nitrate levels and consistent oxygenation.
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Live plants are not recommended as they may be uprooted or ignored. Use artificial plants sparingly for visual balance.
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Moderate lighting enhances natural colors and reduces stress. Avoid intense overhead light.
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Maintain stable tropical temperatures between 24–28°C with a reliable heater.
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Use smooth sand or fine gravel. This species may occasionally dig, so avoid sharp substrates.
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Incorporate large, stable rocks and caves to create hiding zones and territorial boundaries. Ensure all décor is securely placed to prevent collapse due to powerful movements.
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Fish Keeping Snapshot :
Preferred Water Parameters :