Zonatus Cichlid (Cyprichromis zonatus)

Zonatus Cichlid (Cyprichromis zonatus) is a compact open-water cichlid found only along the Zambian coast of Lake Tanganyika. It was formally described in 2002 and is readily distinguished in mature males by three or four broad vertical bands across the upper body. Females and subadult males gather in schools above rocky bottoms, while mature males establish courtship territories in the water above large rocks and boulders.

This is not a 200-litre pair fish or a general tropical community cichlid. A responsible long-term plan provides at least 300 litres and around 140 cm of aquarium length, a group of ten or more, hard alkaline water, strong oxygenation and extensive open swimming room. Its natural diet is zooplankton, so fine suspended foods are more appropriate than large generic cichlid pellets. One quantity buys one unsexed fish in the selected size. The size options do not guarantee sex, mature colour or a breeding pair, and one or two fish are not a complete social group.

The first four gallery images are representative digital illustrations based on the species reference, while the fifth is a supplier reference photograph. None is a photograph of the exact fish dispatched. Individual colour, banding and fin intensity vary with sex, age, social rank, lighting and transport.

Use the supplier photograph as the closest source reference and the illustrations as supporting views of the expected open-water form and mature male pattern. Females, juveniles and subordinate males can be much plainer than the brightest gallery fish. Choose this listing for the documented species identity, available size and care requirements, not for a guaranteed sex, locality, band count or colour intensity.

Cyprichromis zonatus care summary

Requirement	Planning target	Reason
Aquarium	300 L+ and about 140 cm long	Provides a useful schooling lane and space for male open-water territories
Group	At least 10	Supports normal social behaviour and distributes courtship pressure
Temperature	24-27°C	Maintains stable Tanganyika conditions without using the extremes as a target
pH	7.5-8.5	Provides the alkaline conditions expected by Tanganyika cichlids
Hardness	12-30 dGH	Maintains mineral-rich water; measure rather than guess
Food	Fine plankton-style foods	Matches the small mouth and feeding position in open water
Experience	Intermediate	Group structure and stable high-pH water require active management

These figures should be used together. Ten fish in a short 200-litre tank do not become suitable because each fish is small, and a large aquarium does not compensate for acidic or unstable water. The filter must already process the intended bioload with zero ammonia and nitrite before the fish arrive.

Identity, description and the meaning of zonatus

Cyprichromis zonatus is a valid species, not a colour morph of C. leptosoma or C. microlepidotus. Takahashi, Hori and Nakaya described it from specimens collected along the Zambian coast, including the type locality near Kasenga. The Latin-derived species name refers to the banded appearance of mature males.

Male colour is unusually useful for recognition. FishBase summarises a yellowish body with a bluish or darker upper surface, three or four broad vertical bands beneath the dorsal-fin base, yellow lines along lower scale rows, a blue dorsal fin and contrasting colour in the remaining fins. Females show indistinct bands and much duller fin colour. Body measurements and scale counts separate the species scientifically from other Cyprichromis, but those technical characters are not a reliable way to sex a juvenile in a retail bag.

No collection locality is provided beyond the species' known Zambian distribution. Do not assume a Kombe, Kasenga or other locality, or wild-caught or first-generation provenance. If a documented locality line matters to a breeding project, request that evidence before purchase.

Adult size, sex differences and dispatch grades

The formal account gives a maximum of 8.6 cm standard length for males and 8.1 cm for females. Standard length excludes the tail, so a practical total-length plan is approximately 10-11 cm. This makes C. zonatus compact, but not a nano fish: social space, not body length alone, determines the aquarium size.

Fish or option	What to expect	What is not guaranteed
4-5 cm grade	Young fish with developing proportions	Sex, adult bands or dominant-male colour
5-6 cm grade	Larger juvenile or subadult	A male/female pair or immediate display colour
Mature male	Three or four upper-body bands and brighter fins	An exact match to one photograph
Female	Smaller adult with faint bands and subdued fins	The bright male pattern shown in display images

Use the live selector for the size, price and availability offered at checkout. Each quantity is one unsexed fish. Ordering two does not prove that the fish are one male and one female, bonded or sufficient for welfare. Plan this species as a group of ten or more.

Natural habitat and depth

The species is endemic to Lake Tanganyika and known from the Zambian shoreline. Recorded depth spans roughly 9-30 metres. Females and subadult males have been observed in schools one to five metres above rocky bottoms, sometimes joining schools of related species. Mature males behave differently: they defend a three-dimensional territory above a large rock or boulder, particularly around 15-25 metres depth.

This combination explains why the aquarium needs open water and selected rock structure. The fish does not require a rock wall packed from base to surface. A few stable boulder-like features help define male display zones, while most of the middle and upper volume remains available to the school. Clear escape routes are vital; a subordinate male should be able to leave a territory without being trapped against glass.

Lake Tanganyika is consistently mineral rich and well oxygenated. Captive fish experience far faster changes than wild fish when a heater fails, a filter blocks or a large volume of chemically different water is added. Stability and oxygen are therefore part of habitat replication, not optional technical extras.

School size and male territories

Keep at least ten. Eight is sometimes quoted as a lower aquarium minimum, but ten gives a better starting social spread. The aquarium must scale with the group. Several males can coexist when each has open-water territory and females can move between them, but a short tank compresses those territories into continual conflict.

Do not mistake “schooling” for perfectly synchronized movement. Adult males may hold position and display above a rock while females and subadults move as a looser group. Brief chases and postural displays are normal. Persistent pursuit, a fish pinned behind equipment, refusal to feed or progressive weight loss is not normal and requires intervention.

Juvenile groups may mature with an unfavourable sex balance. Keep a divider, mature spare aquarium or realistic rehoming route available. Retail size grades are not sex selections. Adding one new fish later to an established adult hierarchy can be much harder than establishing a similarly sized group together.

Why 300 litres and 140 cm is the practical floor

Specialist aquarium references converge around 300 litres and 120-140 cm as a minimum range for a group. Use the more conservative 140 cm planning length because mature males establish territories in open water rather than only occupying small caves.

Front-to-back width also matters. It allows the school to pass around a displaying male instead of crossing the same narrow line. A 300-litre tall column with a short front length is not equivalent to a long aquarium. Larger is sensible when adding other cichlids, multiple male territories or substantial rockwork.

Open-water aquascaping and a secure lid

Build low or moderate rock groups at the back and ends, including one or more prominent boulders that break sight lines. Leave a broad uninterrupted lane through the middle and upper levels. Rocks must rest securely on the base, not on loose sand that another cichlid can excavate.

Fine sand suits the lake display and possible lower-level companions, although C. zonatus rarely depends on the substrate. Plants are optional. Vallisneria or well-secured hard-water-tolerant epiphytes can be used around the margins, but a dense planted layout removes swimming room. Driftwood is unnecessary and may work against the desired chemistry where buffering is weak.

Fit a close lid. Open-water fish can jump when startled by maintenance, abrupt lighting or pursuit. Close gaps around cables and returns without sealing ventilation. Use a timed light and soften the transition with room lighting so the school is not dropped instantly from bright illumination into darkness.

Filtration, circulation and oxygen

Choose filtration by mature biological capacity and real-world flow, not only the figure printed on the box. A well-maintained canister, sump or multi-filter system can work. The return should disturb the surface strongly and circulate the entire open zone without producing one harsh jet that forces fish to swim continuously.

High pH increases the toxic fraction of ammonia, so any detectable ammonia deserves immediate action. Nitrite must also remain zero. Test after power cuts, major media cleaning, medication, new stocking or unexplained rapid breathing. Mechanical media should be rinsed before it blocks, while biological media is cleaned gently and never all at once.

Use guards where fry are possible and inspect intakes for trapped food. The best circulation pattern carries fine waste toward the filter while leaving calmer areas where females and subordinate fish can rest without leaving the school entirely.

Water chemistry and routine targets

Parameter	Range	Practical management
Temperature	24-27°C	Hold a stable middle value and match new water closely
pH	7.5-8.5	Maintain alkalinity; do not dose impulsively to chase a decimal
GH	12-30 dGH	Test tap water and use a repeatable remineralisation recipe if needed
Ammonia	0 mg/L	Any reading is urgent in alkaline water
Nitrite	0 mg/L	Confirms the second stage of nitrification is functioning
Nitrate	Low and stable	Use its trend to set water-change volume and frequency

A 25-35% weekly water change is a reasonable starting routine. Adjust it for nitrate trend, group size and feeding. Dechlorinate fully and prepare replacement water before use. Sudden conductivity, pH or temperature changes can stress fish even when the final reading falls inside the published range.

Measure GH and preferably KH rather than assuming all hard-looking tap water is suitable. If buffers or mineral salts are required, mix them outside the aquarium. Never pour a corrective dose around fish in response to one unexpected test without confirming the result.

Natural diet and suitable foods

Cyprichromis zonatus feeds on zooplankton. It is therefore best described as a carnivorous zooplanktivore rather than a broad omnivore. Its mouth and feeding position suit small particles drifting through open water. Large bottom pellets are easily missed and may instead feed territorial substrate species.

Food	Use	Serving approach
Fine slow-sinking granules	Measured staple	Scatter broadly so the whole school intercepts particles
Frozen Cyclops or copepods	Close plankton analogue	Thaw and release into gentle current in small portions
Daphnia	Varied small prey	Match the particle to the smallest fish in the group
Artemia	Conditioning and appetite support	Rotate rather than using it as the only food
Finely sized mysis	Occasional richer item	Chop if necessary and remove pieces that sink uneaten

Crushed flake can be accepted but should be chosen for ingredient quality and freshness, not because it is cheap. Avoid mammal meat, unverified feeder fish, oversized pellets and a diet dominated by bloodworm. The goal is several appropriate foods, not an endless list of treats.

Feeding frequency and condition

Offer two or three small meals to established adults. Add a little across the water surface, pause while the group intercepts it, and add more only if every area is still feeding. Food reaching the bottom in quantity indicates that the particle or portion is wrong.

Observation	Possible cause	First response
One fish misses every meal	Hierarchy, illness or unfamiliar food	Distribute food more widely and observe breathing/faeces
Pinched abdomen	Chronic underfeeding or disease	Check competition and quarantine history promptly
Swelling after meals	Overfeeding, unsuitable food or illness	Stop feeding and investigate water and digestion
Food sinks untouched	Particle too large or feeding response poor	Reduce size and offer a familiar plankton-style item

Compare body condition across the school weekly. Dominant males often reach food first and can make the group appear well fed while quieter females or subadults lose weight. A photograph from the same angle is a useful record.

Planning a Tanganyika community

Compatible companions must share the chemistry without crowding the same open-water territory or outcompeting the group at meals. Carefully selected shell dwellers and calm sand-associated Tanganyika cichlids may use lower levels in a larger aquarium. Some smaller Synodontis can work, but species, adult size and impact on fry must be considered.

Use the Lake Tanganyika cichlid collection to compare adult requirements. The Ocellated Shell Cichlid illustrates a bottom-territory strategy, while Blue Neon Paracyprichromis is a related but behaviourally distinct open-water comparison. A link is not a blanket stocking approval; calculate every adult group and territory.

Avoid aggressive mbuna, boisterous feeders, fin nippers, soft-water community fish and large predators. Do not place slender Cyprichromis with adult Frontosa or other piscivores capable of swallowing them.

Mixing Cyprichromis species and locality lines

Related species can share chemistry but still be a poor breeding combination. Females and subadult males of C. zonatus may join other Cyprichromis schools in nature, yet an aquarium is a restricted space and offspring identity matters. Avoid mixing close forms where hybridisation or uncertain parentage would compromise a locality or species line.

The Black Smallscale Cyprichromis belongs to C. microlepidotus, while the Jumbo Yellow Sardine Cichlid belongs to the C. leptosoma complex. Compare them as alternative school choices rather than buying several small groups to fill one tank.

Maternal mouthbrooding

Mature males display from open-water territories above a rock. A receptive female enters the display area, takes the eggs into her mouth and carries the brood herself. Ordering two unsexed fish does not create a breeding pair; spawning develops within a socially balanced group.

A holding female may stop eating and show a fuller throat. Avoid repeated netting, stripping too early or trapping her with persistent males. Some breeders leave a settled female in a spacious group; others move her later to a matched, mature release tank. Either method needs calm handling and identical water chemistry.

Incubation in related Cyprichromis is commonly around three weeks, but temperature, stress and individual condition affect timing. Released fry can take Artemia nauplii, copepods and fine prepared fry food. Protect filter intakes and keep portions tiny so a grow-out system is not overwhelmed.

Health checks and warning signs

Sign	Check first	Action
Rapid breathing across the group	Oxygen, temperature, ammonia and nitrite	Correct the environmental emergency immediately
One fish isolated near the surface	Male pressure, injury, food access	Prepare separation before condition declines
Clamped fins or flashing	Recent additions, irritants, skin/gill signs	Quarantine and diagnose rather than dosing blindly
Female not eating with enlarged throat	Possible mouthbrooding	Observe behaviour before treating as digestive disease

Water tests come before medication. Ammonia, nitrite, low oxygen and unstable pH can mimic disease, while unnecessary treatment can damage the filter. Quarantine new fish and use dedicated nets where possible. Seek aquatic-veterinary or experienced specialist help when signs do not point to a clear cause.

Daily and weekly maintenance

Interval	Task	Useful record
Daily	Check breathing, school position, pursuit and appetite	Any fish repeatedly absent from the group
Weekly	Test nitrate and change 25-35% as required	pH, temperature and water-change volume
Weekly	Inspect intakes, lid gaps and flow	Reduced circulation or trapped debris
As needed	Rinse mechanical media in removed tank water	Flow before and after cleaning
Monthly	Compare GH/KH with prepared source water	Gradual mineral drift

Do not replace all biological media, deep-clean every filter and rearrange every territory on one day. Regular modest work is safer than occasional corrective demolition. Recheck the school after maintenance; abnormal breathing can reveal a temperature, dechlorination or gas-exchange mistake quickly.

Preparing for UK live-fish delivery

Confirm the mature aquarium, lid, filter and water chemistry before choosing a dispatch date. Have fine familiar food ready and ensure someone can receive the parcel. The live-fish delivery page carries the current service and guarantee terms.

Follow the order-specific acclimation instructions because sealed-bag chemistry changes during transport. Keep the room calm and lighting low, do not add shipping water to the aquarium, and avoid prolonging exposure after the bag is opened. The acclimation timer can organise the process, but the instructions supplied with the order take priority.

Report an arrival concern immediately under the current terms, retaining the bag, label and clear photographs. A pale fish after transport is not automatically misidentified: juveniles, females and stressed adults can all suppress colour.

How to interpret the gallery

The gallery contains four representative digital illustrations and one supplier reference photograph. They show the deeper body, large eye and potential blue, yellow and banded male colour. They are not photographs of the exact fish dispatched. Sex, maturity, social rank, lighting and transport affect appearance.

Planted and driftwood backgrounds are illustrative, not habitat instructions. The species requires open water beside rock in a hard alkaline Tanganyika system. Use the scientific name and selected size as the identity basis rather than expecting a juvenile or female to reproduce one adult male picture.

Pre-purchase checklist

Question	Ready when...
Is the footprint adequate?	The aquarium is 300 L+ and around 140 cm long
Is the group complete?	You can maintain at least ten, not merely the discounted pair
Is the chemistry stable?	24-27°C, pH 7.5-8.5 and 12-30 dGH can be sustained
Is filtration mature?	Ammonia and nitrite are zero under the planned load
Are companions safe?	No large predator, aggressive feeder or incompatible soft-water fish is present
Can you receive the parcel?	A responsible person can inspect and acclimate immediately

Check dimensions with the tank-volume calculator, compare chemistry with the water matcher and use the tank-mate planner as a starting screen. Tools support species research; they do not turn an undersized or incompatible plan into a safe one.

How zonatus differs from other Cyprichromis

The genus contains several slender schooling cichlids that can look confusingly similar in dealer photographs. C. zonatus is relatively deep bodied and large eyed, with the adult male's three or four broad upper-body bands providing its most accessible visual clue. The bands are absent or much less distinct in the other described species. C. microlepidotus has many more scales in its longitudinal series, while C. leptosoma, C. pavo and C. coloratus differ in combinations of scale counts, fin rays, body depth and live colour.

Those scientific differences matter because “sardine cichlid” is often used loosely across the genus. A generic common name should not overwrite the accepted identity. This fish is sold as Cyprichromis zonatus; do not relabel it as a Kasai smallscale fish or a C. leptosoma colour form.

Photographs still have limits. A female with indistinct bands and dull fins can be difficult to identify from colour alone, particularly after shipping. Reliable provenance begins with documented source identity and continues through separated breeding records. Do not distribute fry under a locality or species name when mixed parents make that identity uncertain.

Common planning mistakes to avoid

Mistake	Why it fails	Better plan
Buying the discounted pair only	Two fish do not provide a school and may mature as two males	Plan ten or more in the final aquarium
Using a tall 200 L tank	Litres do not replace the 140cm social and swimming axis	Choose a long 300 L+ footprint
Filling the tank with rock	A solid wall removes the open-water habitat and escape routes	Use selected boulders around a large swimming zone
Feeding large cichlid pellets	Food falls below the school and does not match its small mouth	Offer fine suspended plankton-style foods
Adding Frontosa because both are Tanganyikan	Matching chemistry does not remove predation risk	Select calm, non-predatory companions by adult behaviour
Judging identity from bright male colour	Females, juveniles and stressed fish can look much plainer	Use accepted identity, provenance and several characters

Another frequent mistake is correcting pH rapidly. Buffers can move chemistry faster than fish can adapt, especially when the keeper does not know the source water's KH. Confirm the test, prepare matched replacement water and make controlled corrections. The same patience applies to social problems: observe which fish initiates pursuit and where the victim is trapped, then change the territory or separate the aggressor before injury occurs.

Availability is specific to each size and can change. Choose only a grade currently shown as available in the live selector; an unavailable size does not necessarily mean every size is unavailable.

Frequently asked questions

Is Cyprichromis zonatus a beginner fish?

It is better for an intermediate keeper who can manage a large group, stable Tanganyika chemistry and small suspended foods.

How large does the Zonatus Cichlid grow?

The formal maximum is 8.6 cm standard length for males and 8.1 cm for females. Plan approximately 10-11 cm total length including the tail.

What aquarium size does it need?

Use at least 300 litres and around 140 cm of front length for a group. More space is appropriate for companions or several adult males.

Can I keep only a pair?

No. This is a schooling species and should be kept in a group of at least ten. A two-fish quantity offer is not a welfare recommendation.

Can the two fish be guaranteed male and female?

No. Ordinary centimetre grades are unsexed unless the selector explicitly states otherwise, and two fish are not a complete social group.

What does zonatus mean?

The name refers to the banded male pattern, especially three or four broad vertical bands on the upper body.

Where does the species come from?

It is endemic to Lake Tanganyika and currently known from the Zambian coastline, at recorded depths of roughly 9-30 metres.

What does Cyprichromis zonatus eat?

It is a zooplanktivore. Feed fine slow-sinking granules plus appropriately sized Cyclops, copepods, daphnia, Artemia and occasional finely sized mysis.

Is it peaceful?

It is less aggressively substrate-focused than many cichlids, but mature males defend open-water territories. “Peaceful” must not hide its group and space requirements.

Can it live with Frontosa?

This is not recommended. Large predatory Cyphotilapia can treat slender Cyprichromis as prey.

Does it need rocks?

Use stable boulder-like features to define territories, but leave most of the middle and upper water open for schooling.

Can it live in a planted tank?

Hard-water-tolerant plants can be kept at the margins, but dense planting must not replace the open swimming zone.

Which parent mouthbroods?

The female carries the brood. Males display from open-water territories above rock.

Why might the delivered fish have faint bands?

Females and juveniles are less strongly marked, and transport or subordinate status can suppress adult male colour temporarily.

Is it threatened in the wild?

The IUCN assessment cited by FishBase lists the species as Least Concern, assessed in 2014. That does not remove the need for honest provenance and responsible breeding records.

Evidence and further reading

• FishBase: Cyprichromis zonatus for identity, size, colour, distribution, depth and observed social habitat.
• Catalog of Fishes: Cyprichromis zonatus for valid status, authorship, type locality and Zambian distribution.
• Tanganyika.si: C. zonatus Kombe account for specialist aquarium and locality context; this fish is not claimed as Kombe.
• Nordic Cichlid Society species register for zooplankton feeding and maternal mouthbrooding.

Use 24-27°C, pH 7.5-8.5 and 12-30 dGH as the practical water range. The 300-litre, 140 cm group plan is supported by specialist aquarium references and gives the school meaningful open-water space.