Dwarf Shell-Dweller, Brevis (Lamprologus brevis)

Decide whether this shell-dweller fits your aquarium

The Dwarf Shell-Dweller, Brevis (Lamprologus brevis) is a freshwater cichlid in the family Cichlidae, endemic to Lake Tanganyika in Africa. FishBase records a maximum length of 5.5 cm total length and now lists it as Neolamprologus brevis. It suits a keeper prepared to build around hard, alkaline water, a sandy floor, numerous empty snail shells and vigorous defence of a small shell territory.

Keep it at 23–25°C, pH 8.0–8.6 and 12–18 dGH. These routine values are the overlap of FishBase’s recorded environment, the Seriously Fish aquarium range and OATA’s African lake cichlid group guidance. For a pair, use at least 40 litres with a 45 × 30 × 30 cm aquarium as the stated benchmark; a colony needs a larger aquarium.

This is a compact fish, but its small body does not remove the need for territory, stable water or a mature biological filter. Floor space and shell placement matter because the fish lives close to the substrate and organises its behaviour around a chosen shell.

Understand its shell-centred way of life

In Lake Tanganyika, FishBase describes this fish as benthopelagic and plankton-feeding. In practical terms, plan for a fish associated with the lower part of the aquarium and feed it with foods that fit a plankton-based natural diet. Its home aquarium should provide open areas of sand rather than treating the bottom merely as decoration.

The shell is both shelter and the centre of a defended territory. Seriously Fish describes vigorous defence of the shell and the small area around it, with established territories usually measuring no more than 6 inches across. That compact territory still needs clear boundaries: a small aquarium can become crowded quickly when several fish choose neighbouring shells.

Give behaviour room to work

• Sand: provide a layer at least 2 inches deep because this species likes to dig, and a female may bury her chosen shell until only the entrance is visible.
• Shells: provide more empty snail shells than there are fish, giving each individual alternatives instead of forcing competition for one opening.
• Open floor: retain broad sandy areas around the shells so fish can approach, dig and defend their immediate space.
• Other zones: community candidates should occupy different parts of the aquarium rather than depending on the same shell field.

Several individuals kept together will form a colony, while pairs can share a shell in some circumstances. Shell sharing may or may not appear in the aquarium, depending on the number of shells provided and the individual fish.

Choose the dispatch size and understand the sold unit

One purchase supplies one fish of the size chosen on the live size selector. The selector labels are 3–4 cm, 4–5 cm and 5–7 cm. The size you select is the size supplied, not the adult size. Use the dispatch label to choose the length sent, then plan the aquarium around the 5.5 cm recorded maximum, the 40-litre pair benchmark and the extra space required by a colony.

Sex is guaranteed only when the selected option explicitly states male or female. This Dwarf Shell-Dweller, Brevis listing has no sex-guaranteed option. Young fish are not easy to sex, and neither colour nor a dispatch length should be used to assign a sex.

The gallery images are representative, based on reference photographs of this species, so colours can look slightly different from the live animal. One gallery scene shows two fish because it illustrates their appearance together; it does not change the purchase unit of one fish.

Plan before selecting a size

• Confirm that the aquarium is mature, filtered and already holding the required hard, alkaline water.
• Count the fish being planned, then provide more shells than that number.
• Use at least 40 litres for a pair and move to a larger aquarium when planning a colony.
• Screen every community candidate by water requirements, aquarium zone and use of territory before combining it with this shell-dweller.

The dispatch measurement is an offer detail, not a life-stage or origin statement. Choose it only as a size-at-dispatch decision.

Plan the aquarium around the adult length

Use 5.5 cm as the recorded maximum length throughout your planning. FishBase gives that figure as total length for a male or unsexed fish. The dispatch size you choose does not change that 5.5 cm planning figure.

Seriously Fish gives an aquarium of 45 × 30 × 30 cm, around 40 litres, for a pair. Treat 40 litres as the minimum pair benchmark, not a colony allowance. A colony needs a larger aquarium so additional shells and territories can be spread across a wider floor.

Apply the benchmark to the intended social plan

Litres cannot be assessed in isolation. The same nominal volume can offer very different usable floors, and this fish’s shell-centred territory sits on the substrate. Prioritise a layout that holds open sand and separated shells without compressing every entrance into one contested patch.

Before adding more individuals, inspect the existing shell field. If every usable shell sits inside one fish’s defended area, adding another fish increases conflict without creating another territory. Expand the planned aquarium and redistribute the shell choices before increasing the colony.

Build a deep sandy shell field

Cover the aquarium floor with at least 2 inches of sand and leave large areas open. Seriously Fish describes digging as a characteristic behaviour and recommends numerous empty snail shells. Hard, alkaline water remains essential, so the entire layout should work with the water plan rather than against it.

Provide more shells than fish. Treat that as the minimum; Seriously Fish also recommends a good number of empty snail shells. For two fish, three shells meet the instruction to have more shells than fish; four or more offer additional choices. For four fish, begin with at least five. Increase the count when some shells are inaccessible, occupied or placed inside another fish’s defended area.

Arrange the floor in usable zones

• Keep entrances accessible: use empty snail shells that the fish can enter. Escargot shells are named by Seriously Fish as one practical choice.
• Spread the choices: space shells rather than concentrating every entrance in one tight cluster. Separation helps create distinct points around which territories can form.
• Leave digging depth: maintain the full sand depth around shell sites. A female may bury her chosen shell until only the entrance can be seen.
• Protect open sand: do not fill the entire floor with objects. Open substrate is a central part of the recommended environment.

Count usable shells after arranging the aquarium, not while they are still in a box. A shell hidden behind inaccessible décor or trapped where the fish cannot approach it does not help distribute territory.

Observe which entrances the fish actually uses. An unused shell may simply be less attractive to that individual, so retaining several alternatives is more useful than forcing one position. If a colony begins to concentrate around a single patch, review the spacing and the larger-aquarium requirement rather than assuming the small adult length permits crowding.

Keep the water hard, alkaline and within the shared range

Keep the aquarium at 23–25°C, pH 8.0–8.6 and 12–18 dGH. This is the overlap of FishBase’s recorded species environment, Seriously Fish’s aquarium range and OATA’s African lake cichlid values, so every routine target sits inside all three ranges.

FishBase records 23–25°C, pH 8.0–9.0 and 9–19 dH. Seriously Fish gives 23–27°C, pH 7.5–9.0 and 8–25 dGH. OATA gives African lake cichlids 23–27°C, pH 8.0–8.6 and 12–18 dGH; it also gives 10–15 dKH for carbonate hardness.

Test the aquarium at least weekly and record the result before deciding that a trend is stable. Every test should include ammonia, nitrite and nitrate as well as temperature, pH and hardness, because temperature and mineral readings cannot show whether the biological filter is processing waste.

Use our water chemistry guide to understand the measurements, then enter real test results into the water matcher. Compare the aquarium’s measured values with the full target instead of judging suitability from pH alone.

Treat replacement tap water with a suitable conditioner before adding it. Test regularly enough to spot movement away from the range, and correct the underlying water plan before increasing feeding or fish numbers.

Establish filtration before adding the fish

Use a well-established and maintained biological filter. The RSPCA explains that fish release toxic ammonia and that filter bacteria convert it first to nitrite and then to safer nitrate. A filter therefore needs time to mature before livestock is added; water that looks clear is not a substitute for zero ammonia and zero nitrite.

Prepare and mature the aquarium using our first tropical tank guide. OATA recommends an oversized filter for crowded African lake cichlid communities and vigorous aeration to maintain dissolved oxygen. Match the equipment decision to the intended pair, colony or community rather than waiting for rising waste to reveal that capacity is too low.

Follow the weekly maintenance sequence

1. At least once every week, test ammonia, nitrite and the other planned water values.
2. Change 25% of the aquarium water during that weekly routine.
3. Treat replacement water with tap-water conditioner before it enters the aquarium.
4. Use a siphon to remove accumulated solid waste without removing the shell field the fish needs.
5. Check the filter for blockages and confirm that water movement and aeration continue normally.
6. If filter media needs cleaning, rinse it lightly in aquarium water removed during the partial change.

Do not rinse filter media under the tap. Any chlorine or chloramine present may kill the beneficial bacterial population established in the media. Rinsing lightly in removed tank water reduces the amount of bacteria lost, and the filter depends on that bacterial population to process fish waste.

Increase livestock numbers slowly. OATA warns that beneficial bacteria must increase as fish numbers and feeding rise; adding too much livestock too quickly can produce new tank syndrome, with harmful ammonia and nitrite. For a colony plan, let filtration capacity and test results develop alongside the population rather than treating the full intended number as one addition.

Feed for a plankton-based natural diet

Make live and frozen foods the main part of the diet. FishBase records plankton as the wild food of Neolamprologus brevis, while Seriously Fish recommends mainly live and frozen foods in the aquarium. Dried varieties are usually accepted, especially by tank-bred fish, but should not make up the bulk of the diet. The origin of an individual fish should not be inferred from whether it accepts dried food.

Feed only what the fish can eat within a few minutes, twice a day. This amount and frequency follow OATA’s African lake cichlid feeding guidance. Keep live and frozen foods as the staple, as Seriously Fish advises for this species.

Use the fish and the water to set the portion

Uneaten food adds waste that the biological filter must process. Overfeeding can therefore push ammonia, nitrite or nitrate in the wrong direction even when the chosen food is nutritionally appropriate. Portion control is part of water-quality management, not merely a way to avoid waste.

Feed where the fish can reach the food without requiring it to abandon the lower aquarium entirely. In a community, observe whether faster fish consume the ration first. A candidate using another tank zone is useful only if the shell-dweller can still feed and defend its immediate shell area without continuous competition.

Follow the arrival and acclimatisation sequence

Tropical Fish Co hand-packs the fish in pure oxygen inside an insulated poly box, with a heat pack when the weather calls for it. A licensed live-animal courier carries the parcel. Read the current delivery and Live Arrival Guarantee policy before the delivery date and arrange for someone to receive the parcel in person, because live fish must not be left unattended at the delivery address.

When the parcel arrives

1. Start filming before opening it. Film every delivery from the sealed parcel onward, keeping the outer box visible.
2. Open it the same day it arrives, in one continuous take. Show the fish while it is still inside the sealed bag and before anything is disturbed.
3. Float the bag for 20–30 minutes. This is the store’s acclimatisation step before release.
4. Release the fish without pouring the bag water into the aquarium.

For a Live Arrival Guarantee claim, contact us the same day with the order number and continuous unboxing video showing the sealed parcel, the opening and the fish still in its sealed bag. Keep the fish in the bag until the required condition has been filmed.

Check the aquarium separately

OATA advises checking that ammonia and nitrite are zero before adding fish. Confirm the planned 23–25°C, pH 8.0–8.6 and 12–18 dGH range as an aquarium-care check, and make sure the filter has matured before arrival.

Add livestock slowly because feeding and waste increase the load on the bacterial population in the filter. Do not combine arrival day with a large, untested population increase. Once the fish is released, begin observing its swimming, breathing, appearance, response to food and use of shells.

Read shell defence and health changes correctly

Expect the fish to organise its activity around a shell and defend the small area nearby. Seriously Fish describes the territory as usually no more than 6 inches across, but says it is defended vigorously. The fish will even bite a hand or finger entering that personal space. This is normal territorial capability, not permission to ignore persistent conflict between fish.

A pair may share a shell in circumstances where shells are scarce, and the same behaviour may or may not appear in an aquarium. Continue to provide more shells than fish rather than trying to force shell sharing. This species is a shell brooder, and a female may bury a selected shell until only its entrance remains visible.

Young fish are not easy to sex. Adult males are described as considerably larger than females, but size, colour and gallery appearance should not be used to assign the sex of a selected fish.

Observe at every feed

• Swimming: note hanging at the surface, sitting on the bottom outside its usual pattern or erratic movement.
• Colour and temperament: watch for unusual darkening, paling, increased aggression or more hiding than normal.
• Breathing: compare gill-cover movement with the fish’s established pattern.
• Appearance: look for white spots, fluffy growths, missing fins or scales, ulcerations, bumps or a change in body condition.
• Feeding: notice reduced intake or loss of interest rather than compensating with a larger portion.

Keep a regular check

At each of the two daily feeds, check that the fish can approach food without continuous displacement from the shell area. Keep additions slow while the filter bacteria respond to the new waste load.

Review the weekly water-test record, shell use and territorial pattern together. If behaviour, breathing, appearance or appetite changes, test water quality and contact us for further guidance. Do not choose a disease treatment from appearance alone.

Screen Tanganyikan community candidates carefully

Choose community candidates that use different parts of the aquarium and can share the same hard, alkaline water. Seriously Fish names small rock-dwellers such as Neolamprologus brichardi, smaller Julidochromis species and open-water Cyprichromis species as good candidates. These are conditional examples, not universal tank mates.

Match candidates against 23–25°C, pH 8.0–8.6 and 12–18 dGH before comparing temperament. A fish that occupies another zone still fails the screen if its water needs do not overlap with these routine values.

When comparing fish in our African cichlid collection, separate Lake Tanganyika candidates from Malawi community plans. OATA does not generally recommend mixing Malawi and Tanganyikan cichlids because their temperaments and behaviours differ.

Before adding any candidate, write down the aquarium dimensions, measured water values, current fish, planned shell count and intended candidate.

Prevent territorial conflict before it escalates

Seriously Fish describes it as a territorial species. This fish vigorously defends its shell and nearby space, so conflict is most likely to matter where fish need the same floor area or shell field. Do not assume that a 5.5 cm fish requires little territory simply because its body is compact.

Avoid this combination

• Malawi cichlids: avoid mixing them with this Tanganyikan species. OATA does not generally recommend combining Malawi and Tanganyikan cichlids because of differences in temperament and behaviour.

Reduce pressure on the shell field

• Provide more shells than fish and spread the entrances across usable sand.
• Use at least 40 litres for a pair and a larger aquarium for a colony.
• Choose community fish that occupy different parts of the aquarium.
• Add livestock slowly so territorial behaviour and the filter load can be assessed after each increase.
• In a broader African lake cichlid plan, add more peaceful species before more aggressive species.

OATA advises that rearranging décor can reduce aggression by making fish establish new territories. Use that step as part of a full reassessment of space and stocking, not as a substitute for an aquarium that is too small for the intended colony.

Answer common buyer questions

How big does Dwarf Shell-Dweller, Brevis get?

FishBase records a maximum length of 5.5 cm total length. Plan the aquarium around that adult figure, not the fish’s dispatch length.

What size aquarium does Dwarf Shell-Dweller, Brevis need?

Seriously Fish gives 40 litres, with dimensions of 45 × 30 × 30 cm, for a pair and says a colony needs a larger aquarium.

How many of this fish should I keep together?

Two fish are the 40-litre pair benchmark and a colony needs a larger aquarium; OATA’s African lake cichlid guidance says very few, if any, African lake cichlids do well when kept singly. Provide more shells than there are fish, and let usable floor space and territorial response limit the colony.

Does it suit a beginner?

Choose it only if you can already maintain hard, alkaline water, a mature filter, deep sand and more shells than fish. Keep the FishBase, Seriously Fish and OATA overlap of 23–25°C, pH 8.0–8.6 and 12–18 dGH.

What does Dwarf Shell-Dweller, Brevis eat?

It feeds on plankton in nature. Offer mainly live and frozen foods, feed only what it can eat within a few minutes twice a day, and keep dried food as a minor part of the diet.

What temperature, pH and hardness does this fish need?

Keep it at 23–25°C, pH 8.0–8.6 and 12–18 dGH. These values are the overlap of FishBase’s recorded environment, Seriously Fish’s aquarium range and OATA’s African lake cichlid values.

Is Dwarf Shell-Dweller, Brevis aggressive or a fin-nipper?

It is territorial and vigorously defends its shell and the small area around it. Watch for persistent chasing, hiding or reduced feeding and reassess the combination.

Which fish can live with it?

Seriously Fish names small rock-dwellers such as Neolamprologus brichardi, smaller Julidochromis species and open-water Cyprichromis species as candidates that use different parts of the tank; every combination still needs space, shells and compatible water.

How does Dwarf Shell-Dweller, Brevis arrive alive in the UK?

Tropical Fish Co hand-packs the fish in pure oxygen inside an insulated poly box, adding a heat pack when the weather calls for it, and uses a licensed live-animal courier. Receive the parcel in person, film it continuously from sealed, then float the bag for 20–30 minutes before release.

Check the public references

• FishBase: Neolamprologus brevis — accepted identity, family, distribution, recorded environment, plankton diet and maximum length.
• Seriously Fish: Neolamprologus brevis — aquarium dimensions, water ranges, shell-based setup, food and territorial compatibility.
• OATA: African lake cichlids — UK trade-body guidance on water quality, filtration, feeding, maintenance and community planning.
• RSPCA aquarium environment guidance — biological filtration and the processing of ammonia, nitrite and nitrate.