Neolamprologus Similis
Neolamprologus similis
A fascinating dwarf cichlid endemic to Lake Tanganyika. Known as a 'shell dweller' (or shellie), they live, breed, and seek refuge in empty snail shells (like Escargot or Neothauma shells). They are highly social, forming complex multi-generational colonies. They require hard, alkaline water, a sandy substrate for excavation, and at least 2-3 shells per fish.
Neolamprologus Similis At a Glance
Neolamprologus Similis Tank Requirements
Will Neolamprologus Similis fit in your tank?
Care guides tell you what Neolamprologus Similis needs, the next question is whether your tank can safely provide it. Test Neolamprologus Similis against your tank size, maintenance needs, and the fish you already keep before you buy.
Neolamprologus Similis Water Parameters
Neolamprologus Similis Temperament & Compatibility
Neolamprologus Similis Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Male
Males are larger and establish a territory containing multiple shells and females. They are fiercely protective of their shell bed against any bottom-dwelling intruders (even much larger fish or the aquarist's hand).
Differs in 2 traits from base species
Also known as: Alpha Male, Male Shellie
Female
Females are significantly smaller and spend almost all their time hovering right next to or inside their chosen shell. Best kept in a harem ratio (e.g., 1 male to 2-3 females) to disperse aggression and encourage colony breeding.
Differs in 2 traits from base species
Also known as: Female
Neolamprologus Similis Care Guide Summary
The Neolamprologus Similis, scientifically known as Neolamprologus similis, belongs to the Cichlids - African family group. Adults reach a maximum size of approximately 4.5 cm and have a fusiform body shape with a moderate growth rate. Classified as semi-aggressive, this species primarily occupies the bottom zone of the aquarium and produces a low level of biological waste.
To thrive, the Neolamprologus Similis requires a freshwater only aquarium with a minimum volume of 38 litres and a tank length of at least 45 cm. Water temperature should be maintained between 24°C and 27°C, with a pH range of 7.8–9 and a general hardness of 10–25 dGH. A moderate water flow is preferred.
The Neolamprologus Similis is a rewarding species to keep, provided its core environmental needs are met. This species is available in 2 varieties: Male and Female. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Neolamprologus Similis Habitat Setup
When setting up an aquarium for the Neolamprologus Similis, a moderate water flow best suits their natural preferences. Because this species occupies the bottom zone, the aquarium layout should prioritise sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include a sand substrate to accommodate their sifting behaviour and shells for breeding and shelter. Keepers should note that expect substrate disturbance, so lightweight décor should be secured.
Neolamprologus Similis Compatibility Notes
Classified as semi-aggressive, the Neolamprologus Similis is a social species that requires the company of its own kind to thrive. 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 zone can help reduce competition and territorial overlap.
Who Neolamprologus Similis Is Actually For
Neolamprologus Similis is best for a fishkeeper who wants a species that can settle into a calmer community setup and can provide a keeper who can commit to a proper group of at least 3. It makes the most sense for a hobbyist who will actually build around its needs, especially sand.
The most common mistake is treating Neolamprologus Similis like any other community fish and skipping the soft sand it needs to forage safely. Another frequent problem is underestimating its social needs. A token pair or trio often behaves very differently from a real group.
Neolamprologus Similis Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Neolamprologus Similis.
10 Gallon Standard
15 Gallon Standard
20 Gallon High
20 Gallon Long
29 Gallon Standard
30 Gallon Breeder
Show 22 more tank sizes
Frequently Asked Questions About Neolamprologus Similis
How big does Neolamprologus Similis get?
Neolamprologus Similis (Neolamprologus similis) typically reaches a maximum adult size of approximately 4.5 cm. They have a fusiform body shape and a moderate growth rate.
What tank size does Neolamprologus Similis need?
A minimum aquarium volume of 38 litres and a tank length of at least 45 cm are recommended for Neolamprologus Similis. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Neolamprologus Similis need?
Neolamprologus Similis thrives in freshwater only conditions with a temperature range of 24–27°C, a pH between 7.8 and 9, and a general hardness of 10–25 dGH. A moderate water flow is preferred.
Is Neolamprologus Similis peaceful or aggressive?
Neolamprologus Similis 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 Neolamprologus Similis live alone?
No, Neolamprologus Similis should be kept in groups of at least 3 to reduce stress and encourage natural behaviour.
Does Neolamprologus Similis have any special tank requirements?
Yes. Neolamprologus Similis benefits from sand (sifters) and shells (breeding/hiding) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Useful setup supplies
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Guidarium Editorial Desk
Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.
- Last reviewed
- May 6, 2026
- Last updated
- May 6, 2026
- Issues or corrections?
- Contact the editorial team
Plants That Suit Neolamprologus Similis
These plants pair well with Neolamprologus Similis based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Afzel's Anubias
Anubias afzelii
Anubias Barteri
Anubias barteri
Congo Anubias
Anubias heterophylla
Gillet's Anubias
Anubias gilletii
Java Fern
Leptochilus pteropus
Java Moss
Taxiphyllum barbieri
Fish Similar to Neolamprologus Similis
Shell Dweller (Multi)
Neolamprologus multifasciatus
The smallest known cichlid in the world, endemic to Lake Tanganyika. They live, breed, and seek refuge in empty snail shells. They form highly entertaining, constantly digging colonies where multiple generations live together. Sand substrate and an abundance of empty shells (such as escargot shells) are strictly required for their survival and natural behavior.
Brevis Shelldweller
Neolamprologus brevis
A fascinating miniature African Cichlid endemic to Lake Tanganyika, famous for making its home inside empty snail shells. Uniquely among Tanganyikan shell dwellers, the male and female Brevis will often share the exact same shell. They require hard, alkaline water, a sandy substrate (for burying their shells), and plenty of appropriately sized shells (like escargot shells) to thrive.
Pearly Ocellatus
Neolamprologus stappersi
A fascinating, tiny shell-dwelling cichlid from Lake Tanganyika. Despite their minuscule size, they possess immense attitude and will fiercely defend their chosen snail shells from much larger fish (and even the aquarist's hands). They use their mouths to move sand and bury their shells to their exact liking.
Yellow Sand Cichlid
Xenotilapia bathyphilus
An elegant, bottom-dwelling cichlid endemic to Lake Tanganyika. They are highly specialized 'sand-sifters' that take mouthfuls of sand to filter out small invertebrates. They are relatively peaceful for African cichlids but can be territorial during breeding. They are highly skittish and do best in small shoals. A fine sand substrate is absolutely mandatory for their survival and natural behavior.
Telmatochromis brichardi
Telmatochromis brichardi
A small, fascinating cichlid endemic to the rocky coastlines of Lake Tanganyika. They are predominantly crevice and cave brooders that will also readily adopt empty snail shells in the aquarium. They form temporary pairs to breed, with males fiercely defending the territory while the female cares for the offspring. They require hard, highly alkaline water typical of the African Rift Lakes and a diet that incorporates algae.
Neolamprologus Tretocephalus
Neolamprologus tretocephalus
An endemic cichlid from Lake Tanganyika known for its striking resemblance to the much larger Frontosa cichlid. Despite its moderate size, the 'Tret' is highly aggressive and territorial. In the wild, they are specialized molluscivores (snail eaters) with powerful jaws. They require hard, alkaline water and rockwork caves.