Rostratus Sand Diver
Fossorochromis rostratus
Rostratus Sand Diver is a large Lake Malawi hap known for its sand-diving behavior, impressive adult size, and calm-to-moderate temperament compared with many large predator haps. Males may color down after shipping or when moved to a new aquarium, but they usually regain color once settled and comfortable.
Origin and Habitat
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Native Region: Lake Malawi-wide distribution.
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Natural Habitat: Open sand and shallow-water areas.
Physical Characteristics
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Size: 11-16 inches.
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Coloration: Mature males can show stronger display color, while stress, shipping, or a new tank may temporarily reduce color.
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Body Shape: Large, powerful hap body built for active movement over open sand.
Behavior and Temperament
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Temperament: More peaceful, though adult males can still be territorial with conspecifics.
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Social Behavior: Best kept with large, similarly tempered Lake Malawi haps in a spacious aquarium.
Aquarium Care
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Tank Size: A 125 gallon aquarium or larger is recommended for adults.
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Water Parameters: 74-84°F, pH 7.4-8.4, hard water.
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Tank Setup: Use a sand substrate, open swimming space, scattered rockwork for sight breaks, and strong filtration.
Diet and Feeding
Breeding
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Breeding Type: Maternal mouthbrooder.
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Breeding Notes: Males display to females and may defend breeding areas. Females hold eggs and fry in the mouth, and released fry should be protected.
Tank Mates
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Compatible With: Large Lake Malawi haps and other robust cichlids with similar temperament.
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Avoid: Small fish, delicate peacocks, cramped aquariums, and overly aggressive tank mates that may cause stress.
