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Marlier's Julie
Julidochromis marlieri
📍 Lake Tanganyika
Marlier's Julie is a small, elegant cichlid endemic to Lake Tanganyika, known for its slender body and striking coloration with vertical bars. These fish are relatively peaceful for cichlids and make excellent additions to planted or rock-structured aquariums. They are best kept in pairs or small groups and require stable water conditions typical of Tanganyikan species.
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Care Guide
Diet
Marlier's Julies are omnivorous and should be fed a varied diet including high-quality cichlid pellets, small live foods such as bloodworms and brine shrimp, and vegetable matter like blanched spinach. Feed small portions 2-3 times daily, adjusting quantity based on tank bioload and fish appetite.
Behavior
These fish are relatively peaceful but territorial, especially during breeding. They spend most of their time near the substrate and rocky structures, foraging for food and establishing territories. They are active swimmers that appreciate caves and crevices for shelter and spawning sites.
Breeding
Marlier's Julies are substrate spawners that form monogamous pairs. Breeding is moderately difficult and requires stable water conditions, appropriate cave structures, and minimal disturbance. Fry are guarded by both parents and can be fed infusoria and finely crushed flakes initially.
Tank Mates
Small peaceful fish that occupy different water zones
Algae eater that stays on substrate without competing for territory
Bottom dweller that shares similar water parameters and peaceful nature
Can work but may compete for cave space; choose smaller specimens
Generally safe but may be predated upon if too small
Common Diseases
Ich (Ichthyophthirius multifiliis)
White spots on body and fins, rapid breathing, lethargy, rubbing against objects
Raise temperature gradually to 28-30°C, use ich medication, perform daily water changes, ensure good filtration
Fin Rot
Frayed or deteriorating fins, discoloration at fin edges, lethargy
Improve water quality with frequent water changes, use antibacterial medication, remove sharp decorations
Bloat (Malawi Bloat)
Swollen abdomen, loss of appetite, difficulty swimming, pale coloration
Perform large water changes, feed high-quality foods, reduce feeding frequency, use antibiotic treatment if bacterial
Hole-in-the-Head Disease
Pits or holes in head region, loss of appetite, lethargy
Improve water quality, use activated carbon in filter, feed varied diet with vitamin supplements, treat with metronidazole if parasitic
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Quick Facts
- diet
- omnivore with preference for small invertebrates and plant matter
- lifespan
- 8-10 years
- max size
- 9 cm (3.5 in)
- tank size
- 30 gallons minimum
- temperament
- semi-aggressive
Water it likes
- ph
- 7.5-8.5
- ammonia
- 0 ppm
- nitrate
- <20 ppm
- hardness
- 10-20 dGH
- temperature
- 75–81°F (24–27°C)