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Paracyprichromis brieni

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Paracyprichromis brieni is a species of cichlid endemic to Lake Tanganyika where it is only known to occur in the northernmost portion of the lake.

Aquarium hobby

Experience: Intermediate

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FamilyCichlids

Adult lengthup to 4.3 in

WaterFreshwater

HabitatLives in freshwater

Care at a glance

Species-specific aquarium care

Tank: At least 24 in long and 12 in front to back for one adult (adults commonly reach about 4.3 in / 11 cm).
Water: Freshwater.
Temperature: 73–82°F (range recorded for this species).
pH: 7–8.5.
Hardness: 10–15 dGH.
Layout: An open-water swimmer: needs long, open swimming space with few obstacles.
Diet: A plankton picker: offer small, frequent feedings of fine frozen and live foods (copepods, brine shrimp, daphnia). FishBase classes it as a carnivore.

Calculated from this species' own FishBase record: tank size from its typical adult length and swimming zone, water values from its recorded ranges. The group guide below fills in general care.

Care guide

Species care notes

Tank: a base of at least 47 × 18 in (roughly 54 US gallons); space needed is rated “large tank”.
Water: hard, alkaline water, 75–81 °F, pH 7.5–9, 8–25 dGH.
Behaviour: temperament peaceful; a shoaling fish best kept in a group of six or more.
Difficulty: Moderate (Seriously Fish rating).

Short excerpts from the species profile:

Setup: “This species will generally be found in the upper levels of the aquarium and swimming space is important.”
Tankmates: “Very peaceful and retiring.”
Breeding: “Possible but rarely achieved in captivity.”

From the Seriously Fish profile for this species, which has the full habitat, maintenance, diet, behaviour and breeding write-up 167

Group care guide

Lake Tanganyika cichlids

Applies to most species in this group. Habitat: Rocky reefs, shell beds and sand of Lake Tanganyika. Individual species can differ, so compare with the species numbers above and the linked sources.

Housing & setup

Use species-specific alkaline-water parameters and stable, well-oxygenated conditions. For N. multifasciatus, Seriously Fish gives pH 7.5–9.0 and general hardness 8–25 dGH.
Shell-dwellers need beds of empty snail shells; rock-dwellers like Julidochromis need stacked rockwork; Tropheus need large groups and spacious tanks.

Sources 117 119 164 118 256 273

Climate & lighting

Water

76–81°F

Sources 117 119 164 118 256 273

Diet

Tropheus moorii needs a vegetable-based staple with small suitable live/frozen supplements. Other Tanganyikans need their own feeding plan; shell-dweller and predator diets differ.

Sources 117 119 164 118 256 273

Social life

Often pair- or colony-forming and territorial; research each genus.

Sources 117 119 164 118 256 273

Health watch

Tropheus are prone to bloat on rich foods; sudden water changes stress Tanganyikans.

Sources 117 119 164 118 256 273

Understanding the animal

About this animal

It can reach a length of 11 centimetres (4.3 in) TL. This species can also be found in the aquarium trade. The specific name honours the author, Max Poll's, friend and fellow zoologist Paul Brien (1928-1964) of the Université libre de Bruxelles.

Quoted from the Wikipedia article “Paracyprichromis brieni” (CC BY-SA 4.0) 174

In the wild

From this species’ own FishBase record (habitat, bottom type, water and breeding data), not its family. Good care copies these conditions.¹

Where it lives	Lives in freshwater, in lakes. Gregarious, forms schools of several hundreds of fish. Feeds on zooplankton that are present in the open water column above the rocky habitat.
Water it lives in	Freshwater, 73–82 °F (23–28 °C), pH 7–8.5, hardness 10–15 dH.
Climate	Tropical climate.
Wild diet	Selective plankton feeding.

What this means for care

Keep water within its wild range, 73–82 °F.

FishBase species summary: Paracyprichromis brieni

Native climate (measured)

Warm-season highs	about 88°F (up to 91°F in the hottest sampled areas)
Cool-season lows	about 61°F (down to 54°F in the coldest sampled areas)
Average temperature	69–81°F across sampled records
Relative humidity	54–72% on average (driest month about 46%)
Rainfall	about 1060 mm a year, with strong wet and dry seasons

Measured at 8 wild occurrence records sampled against WorldClim 2.1 climate data (1970–2000 averages). Air conditions in the range are ecological context, not enclosure settings: microhabitats such as burrows, leaf litter or basking rocks can be cooler, warmer or more humid.

From the sources

Quoted from the matching sections of reputable sources for this exact species. Specialist databases are used first; Wikipedia (community-edited, CC BY-SA 4.0) only fills gaps. Other sources are short credited quotes.

Overview	Paracyprichromis brieni is a species of cichlid endemic to Lake Tanganyika where it is only known to occur in the northernmost portion of the lake. It can reach a length of 11 cm TL. This species can also be found in the aquarium trade. The specific name honours the author, Max Poll's, friend and fellow zoologist Paul Brien (1928-1964) of the Université libre de Bruxelles. — Wikipedia (community-edited)
Where it lives	Home ranges Population dynamics Growth parameters Max. ages / sizes Length-weight rel. Length-frequencies Mass conversion Recruitment Abundance Life cycle Reproduction Maturity Maturity/Gills rel. — FishBase
Biology	Gregarious, forms schools of several hundreds of fish. Feeds on zooplankton that are present in the open water column above the rocky habitat. — FishBase

Data and studies

The numbers

Each bar is what one source reports. Where several sources weigh in, the dashed gold band marks their average.

Adult length

Average of sources4.3in

FishBase 1644.3

Seriously Fish species profiles 1674.3

Maximum recorded length. Measured as total length. Fish in home aquariums often stay smaller than wild records.

Water temperature

Average of sources74–81.5°F

FishBase 16473–82

Seriously Fish species profiles 16775–81

Range the species tolerates in nature; aim for the middle.

pH

Average of sources7.2–8.8

FishBase 1647–8.5

Seriously Fish species profiles 1677.5–9

Water hardness

Average of sources9–20dGH

FishBase 16410–15

Seriously Fish species profiles 1678–25

Minimum tank footprint

Reported47in

Seriously Fish species profiles 16747

Seriously Fish recommends a tank base of at least 47 × 18 in (about 54 US gallons).

Sources for this sheet

FishBase (Froese & Pauly, eds.), version 24.07 Peer-reviewed researchThe global scientific database on fishes, maintained by a consortium of research institutions; every value is referenced.
Seriously Fish species profiles Experienced keeper or breederLong-running aquarium reference written and peer-checked by experienced fishkeepers and ichthyologists; each profile covers habitat, tank size, water, diet, behaviour and breeding.
Merck Veterinary Manual: Management of aquarium fish Zoo, university or veterinaryThe Merck Veterinary Manual: a standard veterinary reference written and reviewed by veterinary specialists.
Merck Veterinary Manual: Types and features of aquatic systems Zoo, university or veterinaryThe Merck Veterinary Manual: a standard veterinary reference written and reviewed by veterinary specialists.
Merck Veterinary Manual: Nutritional diseases of fish Zoo, university or veterinaryThe Merck Veterinary Manual: a standard veterinary reference written and reviewed by veterinary specialists.
Seriously Fish — Neolamprologus multifasciatus Zoo, university or veterinaryAdded in the 2026 source-checked care-guide review.
Seriously Fish — Tropheus moorii Zoo, university or veterinaryAdded in the 2026 source-checked care-guide review.
Wikipedia (species article) Community referenceFree encyclopedia; useful overviews with their own citations. Intro text is quoted under CC BY-SA 4.0.