Not furry, but we like them anyway.
Marlieri Julie
Julidochromis marlieri Poll, 1956
Also called Marlier's Julie, Spotted Julie, Chequered Julie, Checkerboard Julie
From Endemic to Lake Tanganyika in East Africa, on rocky shorelines in fairly deep water; FishBase places it in the northwestern part of the lake, while Seriously Fish reports a patchier spread including northern and southern areas.123
At a glance the quick version
Looks how to spot one
Slender, elongated cave-dwelling cichlid
A long, narrow fish built for slipping through rock crevices, with long dorsal and anal fins; adult females end up larger than males.234
Personality what they are like
A characterful fish that claims its own patch of rockwork and guards it keenly; it is happiest as a settled pair and gets on with similar-sized Tanganyikan cichlids that use other parts of the tank.214
Daily activity how busy a day looks
Spends its day close to the rocks and the bottom, exploring caves and crevices rather than cruising in open water.12
Grooming and care the hands-on bits
Keep the water hard, alkaline and well oxygenated with steady, regular water changes; keep only one Julidochromis species per tank so regional forms stay pure.2
Home where they are happiest
Roughly 110 litres (120 x 30 cm base) for one pair, more for several adults; a sandy bottom with stacked rocks forming plenty of caves. Temperature about 22-27 C, pH 7.5-9.5, hardness about 10-25 dGH (FishBase gives a softer 3-12 dH range).21
Food basics what goes in the bowl
A small-item feeder: offer a mix of live and frozen foods with a quality dried food, plus some plant matter such as spirulina or blanched spinach.21
Company who they like around
Best kept as a bonded pair that has formed naturally, often by growing up a small group of youngsters together; pairs are mostly monogamous.21
The story where it all began
Belgian ichthyologist Max Poll described the species in 1956 and named it after zoologist Georges Marlier, who collected the type specimen. It has since become a long-standing favourite among keepers of Lake Tanganyika cichlids, with several regional forms in the hobby.32
Fun facts for the dinner table
- 1
Its species name honours Georges Marlier, a Belgian zoologist who collected the first specimen.3
- 2
Unlike many cichlids, the female is the bigger partner in a pair.2
- 3
It glides along rock surfaces upside down or sideways as easily as the right way up.2
- 4
FishBase notes it hardly ever feeds at the surface, keeping to the lower part of the water.1
Recognised by the official bits
- IUCN Red List
- Least Concern (assessed 15 February 2025)1
- Taxonomy
- Described by Max Poll in 1956; a member of the genus Julidochromis3
The care rhythm a typical week and year
A typical home-care rhythm for a Marlieri Julie. A starting point, not a vet's advice.
- FeedingSmall amounts once or twice a dayevery day
- Temperature checkevery day
- Water changeAbout 25% of the waterevery week
- Water testevery week
- Glass cleanevery week
- Filter rinseRinse in old tank water, never tap waterevery month
Owner questions the things everyone asks
How often should I feed my Marlieri Julie?
Feed your Marlieri Julie small amounts once or twice a day, as Furry Diary's starting plan suggests. This matches its nature as a small-item feeder that enjoys a mix of live, frozen, and quality dried foods.21 Pet Wiki plan
What does a Marlieri Julie eat, and what should it never eat?
A Marlieri Julie enjoys a mix of live and frozen foods with a quality dried food, plus plant matter like spirulina or blanched spinach. What it should never eat varies by individual; ask your vet or a good breeder for specific foods to avoid.21
How much space does a Marlieri Julie need?
A single pair needs roughly 110 litres with a base of 120 x 30 cm, and more space for several adults. Provide a sandy bottom with stacked rocks forming plenty of caves for this rock-dwelling cichlid.21
What temperature, light or water does a Marlieri Julie need?
Keep water temperature between 22-27°C, pH 7.5-9.5, and hardness around 10-25 dGH (though FishBase notes a softer 3-12 dH range). Lighting needs vary; ask a good breeder or exotic-pet vet for guidance.21
How often should I clean a Marlieri Julie's home?
Furry Diary's starting plan suggests a weekly 25% water change, weekly glass cleaning, and a monthly filter rinse using old tank water. Regular cleaning keeps the water hard, alkaline, and well oxygenated.2 Pet Wiki plan
Can a Marlieri Julie live with others?
Yes, it is happiest as a settled pair and gets on with similar-sized Tanganyikan cichlids that use other parts of the tank. Keep only one Julidochromis species per tank to keep regional forms pure.214
How long does a Marlieri Julie live?
Lifespan varies depending on care and environment; ask your vet or a good breeder for a more specific estimate for your fish.
Can I handle a Marlieri Julie?
Handling is not recommended as fish are delicate and stress easily. Enjoy watching your Marlieri Julie explore its rocky caves instead.
Written from the sources on this page, a few checked guides (VCA, ASPCA, RSPCA) and Pet Wiki's own starting care plan. A friendly guide, not a vet's advice.
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Every fact on this page has a numbered source. Spotted an error? support@petwiki.app.
- FishBase: Julidochromis marlieri fishbase.seused for size, origin, water, diet, IUCN, behaviour
- Seriously Fish: Julidochromis marlieri seriouslyfish.comused for care, tank, water, diet, behaviour, breeding
- Wikipedia: Julidochromis marlieri en.wikipedia.orgused for names, etymology, distribution, size
- Wikipedia (de): Julidochromis marlieri de.wikipedia.orgused for regional forms, appearance, breeding
Checked 2026-09-30. Text is written in our own words from these sources.