A strikingly patterned cichlid endemic to the rocky shores of Lake Tanganyika in Africa. They feature a torpedo-shaped body covered in a grid-like pattern of black and white/yellow spots. They are highly territorial cave-spawners that form strong, monogamous pairs. They strictly require hard, alkaline water and an aquarium decorated with extensive rockwork to form secure caves.
Marlier's Julie At a Glance
Marlier's Julie Tank Requirements
Will Marlier's Julie fit in your tank?
Care guides tell you what Marlier's Julie needs, the next question is whether your tank can safely provide it. Test Marlier's Julie against your tank size, maintenance needs, and the fish you already keep before you buy.
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Marlier's Julie Water Parameters
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Marlier's Julie Temperament & Compatibility
Marlier's Julie Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard
The standard form. While they can be kept singly, they are most fascinating when kept as a bonded pair. However, once a pair forms, they become lethally intolerant of any other Julidochromis in the tank.
Differs in 1 trait from base species
Also known as: Gombe, Magara, Burundi, Wild Type
Marlier's Julie Care Guide Summary
The Marlier's Julie, scientifically known as Julidochromis marlieri, belongs to the Cichlids - African family group. Adults reach a maximum size of approximately 13 cm and have a fusiform body shape with a moderate growth rate. Classified as semi-aggressive, this species primarily occupies the bottom and mid-level zones of the aquarium and produces a high level of biological waste.
To thrive, the Marlier's Julie requires a freshwater only aquarium with a minimum volume of 114 litres and a tank length of at least 80 cm. Water temperature should be maintained between 23°C and 27°C, with a pH range of 8.2–9.3 and a general hardness of 10–25 dGH. A moderate water flow is preferred.
The Marlier's Julie is a rewarding species to keep, provided its core environmental needs are met. The Marlier's Julie is typically available in one standard form.
Marlier's Julie Habitat Setup
When setting up an aquarium for the Marlier's Julie, a moderate water flow best suits their natural preferences. Because this species occupies the bottom and mid-level zones, the aquarium layout should prioritise open swimming space in the centre of the tank for free movement and sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include a sand substrate to accommodate their sifting behaviour. Keepers should note that expect substrate disturbance, so lightweight décor should be secured.
Marlier's Julie Compatibility Notes
Classified as semi-aggressive, the Marlier's Julie is adaptable and can be kept singly or in a small group, offering flexibility when planning a community tank. When choosing tankmates, conspecific aggression can be intense, especially in smaller tanks and territorial behaviour may cause issues if hiding spots or floor space are limited. Selecting tankmates that favour different water layers from the bottom and mid-level zones can help reduce competition and territorial overlap.
Marlier's Julie Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Marlier's Julie.
30 Gallon Breeder
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
Show 11 more tank sizes
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Frequently Asked Questions About Marlier's Julie
How big does Marlier's Julie get?
Marlier's Julie (Julidochromis marlieri) typically reaches a maximum adult size of approximately 13 cm. They have a fusiform body shape and a moderate growth rate.
What tank size does Marlier's Julie need?
A minimum aquarium volume of 114 litres and a tank length of at least 80 cm are recommended for Marlier's Julie. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Marlier's Julie need?
Marlier's Julie thrives in freshwater only conditions with a temperature range of 23–27°C, a pH between 8.2 and 9.3, and a general hardness of 10–25 dGH. A moderate water flow is preferred.
Is Marlier's Julie peaceful or aggressive?
Marlier's Julie is classified as semi-aggressive with an aggression score of 6 out of 10. They can work in community setups but may clash with certain tankmates.
Can Marlier's Julie live alone?
Yes, Marlier's Julie can be kept singly or in a group. They are flexible and adapt well to both setups.
Does Marlier's Julie have any special tank requirements?
Yes. Marlier's Julie benefits from sand (sifters) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Plants That Suit Marlier's Julie
These plants pair well with Marlier's Julie based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Balansae
Cryptocoryne crispatula
Italian Val
Vallisneria spiralis
Jungle Val
Vallisneria americana
Red Mangrove
Rhizophora mangle
Fish Similar to Marlier's Julie
Golden Julie
Julidochromis ornatus
A small, striking rock-dwelling cichlid endemic to Lake Tanganyika. They feature a bright yellow body adorned with dark, distinct horizontal stripes. They are crevice spawners that form strong monogamous pairs. While they mind their own business regarding mid-water schooling fish, they are fiercely territorial over their rock piles, especially towards other Julidochromis or similar rock-dwellers.
Dickfeld's Julie
Julidochromis dickfeldi
An elongated, distinctively patterned cichlid endemic to the rocky shores of Lake Tanganyika. Dickfeld's Julie is known for its beautiful blue/purple iridescence along its fins and horizontal stripes. They are highly rock-dwelling and fiercely defend their chosen caves. While relatively peaceful toward unrelated species that occupy different water layers, they are highly aggressive toward conspecifics once a pair is formed.
Regan's Julie
Julidochromis regani
A slender, rock-dwelling cichlid endemic to the shallow, rocky shorelines of Lake Tanganyika. Known for their distinct horizontal stripes and torpedo-like bodies, they are highly territorial over rock crevices. They form strong, monogamous pair bonds but are notoriously aggressive toward conspecifics (other Julies) and benthic competitors.
Masked Julie (Julidochromis)
Julidochromis transcriptus
The Masked Julie is the smallest species in the Julidochromis genus, endemic to the rocky shorelines of Lake Tanganyika. They are torpedo-shaped, crevice-dwelling cichlids with striking black and white checkerboard patterns. While generally peaceful toward other species that occupy different water columns, they are highly territorial and violently aggressive toward their own kind once a monogamous breeding pair is established.
Lemon Cichlid (Leleupi)
Neolamprologus leleupi
A striking, torpedo-shaped cichlid endemic to the rocky shores of Lake Tanganyika. Famous for its intense yellow or orange coloration. They are highly territorial cave-dwellers that require hard, alkaline water. Due to their aggression toward their own kind, they are best kept as a solitary specimen or a confirmed breeding pair.
Horei Cichlid
Ctenochromis horei
A robust and highly aggressive haplochromine cichlid native to Lake Tanganyika. Known for its striking coloration and dynamic, albeit violent, territorial behavior. Adults are opportunistic predators and piscivores. They are maternal mouthbrooders, and males are fiercely intolerant of other males. They require hard, alkaline water.