Care guide · Freshwater · fish

Brevis shell-dweller care

Neolamprologus brevis

Sunspot colour morph; photo by Melanochromis, public domain. Photo: Melanochromis · Source · Public domain (author's own work, PD-self)Resized and compressed; no cropping or colour changes.

The Brevis shell-dweller (Neolamprologus brevis) is a small Lake Tanganyika cichlid living close to empty snail shells. A pair may share a shell and defends a small area around it. Seriously Fish gives a 40-litre aquarium and 45 cm length for one pair; a colony needs more space. Provide deep sand, enough empty shells and hard, alkaline water. The trade name is sometimes confused with Neolamprologus calliurus; this guide follows the checked identity N. brevis. Arrange the floor so each fish can retreat from a defended shell area.

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At a glance

Temperature: 23–25 °C
pH: 8.0–9.0
GH: 9–19 °dGH
Aquarium length: At least 45 cm
Minimum aquarium volume: At least 40 L
Adult size: Up to 6 cm
Group size: At least 2 individuals
Temperament: Territorial

About this species

Neolamprologus brevis was described by Boulenger in 1899 and belongs to the Cichlidae. The Catalog of Fishes treats the combination in Neolamprologus as valid. GBIF accepts N. calliurus separately, although some historical and aquarium sources treat it as a synonym, so trade confusion is possible. Seriously Fish gives a maximum standard length of 6 cm, excluding the tail; FishBase reports 5.5 cm total length. These use different measurement methods and are not directly comparable. Vertical flank bars help distinguish brevis from some similar shell-dwellers.

Natural habitat

The species is endemic to Lake Tanganyika and is reported around the lake. It inhabits soft shoreline substrates where empty snail shells occur, usually in areas with fewer shells than some other shell-dwelling species. A pair may share one shell in nature. The shell is both refuge and breeding chamber; sand gives the fish room to dig and modify the surrounding area.

Aquarium and layout

Seriously Fish recommends 45 × 30 × 30 cm, about 40 litres, for one pair. A colony needs a larger aquarium; the reviewed sources do not establish an exact minimum for one. Provide open sandy areas with a substrate at least about 5 cm deep because the fish like to dig. Offer more empty snail shells than fish and space them out to reduce territorial clashes. The 40-litre recommendation applies only to a pair, not a colony or mixed community. Secure rocks so digging cannot undermine them.

Water conditions

Seriously Fish gives 23–27 °C, pH 7.5–9.0 and GH 8–25 dGH. FishBase lists 23–25 °C, pH 8–9 and hardness 9–19 dH. As a conservative reference, this guide uses the overlap: 23–25 °C, pH 8–9 and GH 9–19 dGH. FishBase ecological values are not a reason to change a stable aquarium abruptly. Test the water and acclimate new fish gradually. The reviewed evidence does not support a separate KH target.

Behaviour and group size

Brevis mainly lives as a pair and may share a shell where shells are scarce. Fish vigorously defend the shell and immediate territory; groups can form colonies, but extra fish also increase territorial pressure. Provide plenty of shells and room to retreat. Seriously Fish names smaller rock-dwelling Julidochromis and open-water Cyprichromis as possible tankmates in other zones. This is not an automatic compatibility guarantee: use a larger aquarium and assess each species, size and behaviour individually. Avoid larger or dominant fish that could displace brevis from shells. The fish may bite intruders; do not put fingers into occupied shells.

Feeding

Seriously Fish recommends live and frozen foods as the main part of the diet. Dried food is usually accepted, especially by captive-bred fish, but should not make up most of the ration. FishBase describes the species as a plankton feeder. Offer small portions near the bottom so fish can feed from their shell area. Vary the diet and remove leftovers. No current approved product with an independently checked suitable form and offer has been confirmed, so no product link is shown.

Breeding

Neolamprologus brevis is a shell brooder. The female lays eggs inside a shell and guards and fans the clutch; after fertilisation the male has no further brood-care role. Seriously Fish reports that fry become free-swimming after about six to seven days. In a community aquarium other fish may eat them, so a separate rearing tank can improve survival. The source gives breeding values of pH 8.0–8.5 and 25–26.5 °C; keep these separate from routine care values. Condition adults with varied live and frozen foods and provide enough shells.

Sources & review

This care guide draws on several specialist sources and was last checked on 17 October 2026.

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