Description
The Julidochromis marlieri, commonly known as the Marlier’s Julie or Spotted Julie, is a striking rock-dwelling cichlid native to the rocky shorelines of Lake Tanganyika. Known for its bold, spotted pattern and confident personality, this species is a favourite among aquarists seeking a visually dynamic and behaviourally interesting addition to a Tanganyikan setup.
Features of Julidochromis marlieri
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Grows up to 12–15 cm in length
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Elongated body with a cream to pale yellow base colour
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Covered in irregular dark spots and broken horizontal bands
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Strong jaw and prominent eyes give it a distinctive profile
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Territorial and aggressive during spawning, but otherwise moderately tempered
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Known for strong pair bonds and secretive cave-spawning behaviour
The Best Aquarium Size for Julidochromis marlieri
A tank of at least 150 litres is recommended, especially for adult pairs. This species needs ample space to reduce territorial disputes and promote natural behaviour.
Tank Mate Compatibility for Julidochromis marlieri
Compatible with similarly sized and temperament-matched Tanganyikan species, including:
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Altolamprologus calvus
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Neolamprologus brichardi
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Cyprichromis leptosoma (upper swimmers)
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Eretmodus cyanostictus (goby cichlids)
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Synodontis catfish (for bottom activity)
Avoid keeping with other Julidochromis species or fish with similar body shapes unless the tank is large and well-structured.
Diet for Julidochromis marlieri
Carnivorous; feed a varied diet of high-protein foods including quality cichlid pellets, flakes, and frozen or live foods such as brine shrimp, bloodworms, and daphnia. Multiple smaller feedings throughout the day support health and colour vibrancy.
Aquarium Setup for Julidochromis marlieri
Aquarium Filtration
Powerful, stable filtration is essential for maintaining excellent water quality and oxygenation in this rock-dwelling species' environment.
Aquarium Plants
Not essential but can be used for aesthetics. Hardy plants like Anubias and Java fern can be secured to rocks.
Aquarium Lighting
Moderate lighting is best. Too much light can stress the fish, but proper lighting brings out their spotted pattern.
Aquarium Heating
Maintain a temperature range of 24°C to 27°C for ideal health and activity.
Aquarium Substrate
Fine sand or smooth gravel helps mimic their natural lakebed. Choose a substrate that supports stable rock placement.
Aquarium Decorations
Create a rock-heavy aquascape with plenty of caves, ledges, and crevices. These structures are essential for territory, security, and spawning. Proper rockwork reduces aggression and encourages natural behaviour.
