Photo: Tino Strauss (CC BY-SA 3.0) — via Wikimedia Commons
Kribensis (Pelvicachromis pulcher)
A jewel-sized African cichlid that paints itself cherry-red when breeding — cave-spawner personality in a community-tank body.
Will it live with a Kribensis?
We compare each fish against your kribensis on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- Adolf's Cory✅ CompatiblePeaceful · 5.5 cm · Medium care · 22–26 °C (72–79 °F)
- Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Adolf's Cory in a shoal of 6+ or it gets stressed and nippy.
- Agassiz's Corydoras✅ CompatiblePeaceful · 6 cm · Easy care · 22–28 °C (72–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Agassiz's Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Banjo Catfish✅ CompatiblePeaceful · 15 cm · Medium care · 20–26 °C (68–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–26 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Black Kuhli Loach✅ CompatiblePeaceful · 8 cm · Easy care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 24–27 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Blood Red Tiger Pleco✅ CompatiblePeaceful · 6 cm · Medium care · 24–29 °C (75–84 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Bolivian Ram✅ CompatiblePeaceful · 8 cm · Medium care · 24–28 °C (75–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Burmese Loach✅ CompatiblePeaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 24–27 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Butterfly Hillstream Loach✅ CompatiblePeaceful · 6 cm · Hard care · 18–24 °C (64–75 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–24 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Corydoras Catfish✅ CompatiblePeaceful · 6.5 cm · Easy care · 22–26 °C (72–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Corydoras Catfish in a shoal of 6+ or it gets stressed and nippy.
- Elegant Cory✅ CompatiblePeaceful · 6 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 24–27 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
- False Julii Corydoras✅ CompatiblePeaceful · 6 cm · Easy care · 22–26 °C (72–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep False Julii Corydoras in a shoal of 6+ or it gets stressed and nippy.
- German Blue Ram✅ CompatiblePeaceful · 6 cm · Hard care · 27–30 °C (81–86 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 27–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Giant Betta✅ CompatiblePeaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Giant Kuhli Loach✅ CompatiblePeaceful · 12 cm · Easy care · 24–30 °C (75–86 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Hillstream Loach✅ CompatiblePeaceful · 6 cm · Hard care · 20–24 °C (68–75 °F)
- Compatible on the things that matter: shared water near 24–24 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Kuhli Loach✅ CompatiblePeaceful · 10 cm · Easy care · 24–30 °C (75–86 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Leopard Frog Pleco✅ CompatiblePeaceful · 9 cm · Medium care · 25–30 °C (77–86 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 25–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Murray River Rainbowfish✅ CompatiblePeaceful · 11 cm · Easy care · 15–26 °C (59–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–26 °C — no size, zone or temperament conflicts.
- Keep Murray River Rainbowfish in a shoal of 6+ or it gets stressed and nippy.
- Peppered Corydoras✅ CompatiblePeaceful · 7 cm · Easy care · 18–26 °C (64–79 °F)
- Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Peppered Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Slate Corydoras✅ CompatiblePeaceful · 6 cm · Medium care · 23–28 °C (73–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Slate Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Spotfin Corydoras✅ CompatiblePeaceful · 6.5 cm · Easy care · 22–26 °C (72–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Spotfin Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Spotted Corydoras✅ CompatiblePeaceful · 7 cm · Easy care · 22–27 °C (72–81 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Spotted Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Spotted Rubbernose Pleco✅ CompatiblePeaceful · 12 cm · Medium care · 20–26 °C (68–79 °F)
- Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Sterbai Corydoras✅ CompatiblePeaceful · 6.5 cm · Medium care · 24–30 °C (75–86 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Afra Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Medium care · 24–28 °C (75–82 °F)
- pH preferences only just meet (Kribensis 6–7.5 vs Afra Cichlid 7.8–8.6) — target the overlap and acclimate slowly.
- Kribensis and Afra Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 75 L tank is below the ~150 L this pairing really wants — crowding raises aggression.
- Keep Afra Cichlid in a shoal of 6+ or it gets stressed and nippy.
- Bearded Corydoras⚠️ With cautionPeaceful · 10 cm · Medium care · 18–24 °C (64–75 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Clown Rasbora⚠️ With cautionPeaceful · 10 cm · Medium care · 23–28 °C (73–82 °F)
- Kribensis and Clown Rasbora are close in size, but the semi-aggressive one tends to dominate — add clown rasbora in a group to spread the pressure.
- Your 75 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
- Keep Clown Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Daffodil Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Medium care · 23–27 °C (73–81 °F)
- Different pH ranges (6–7.5 vs 7.8–9); doable if you sit in the shared band, but not ideal long-term.
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 75 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Electric Yellow Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Medium care · 23–26 °C (73–79 °F)
- pH preferences only just meet (Kribensis 6–7.5 vs Electric Yellow Cichlid 7.8–8.9) — target the overlap and acclimate slowly.
- Kribensis and Electric Yellow Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 75 L tank is below the ~200 L this pairing really wants — crowding raises aggression.
- Giant Danio⚠️ With cautionPeaceful · 10 cm · Easy care · 20–27 °C (68–81 °F)
- Kribensis and Giant Danio are close in size, but the semi-aggressive one tends to dominate — add giant danio in a group to spread the pressure.
- Your 75 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
- Keep Giant Danio in a shoal of 6+ or it gets stressed and nippy.
- Golden Wonder Killifish⚠️ With cautionSemi-aggressive · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Kribensis and Golden Wonder Killifish can both be territorial; doable with space and dense planting, but watch for chasing.
- Keyhole Cichlid⚠️ With cautionPeaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Expect Kribensis to harass Keyhole Cichlid at times; give dense cover and watch them at feeding.
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Molly⚠️ With cautionPeaceful · 10 cm · Easy care · 23–28 °C (73–82 °F)
- Kribensis is semi-aggressive and may chase or nip the smaller Molly — plant heavily and break up sight lines.
- Porthole Catfish⚠️ With cautionPeaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Rosy Barb⚠️ With cautionSemi-aggressive · 10 cm · Easy care · 18–26 °C (64–79 °F)
- Kribensis and Rosy Barb can both be territorial; doable with space and dense planting, but watch for chasing.
- Keep Rosy Barb in a shoal of 6+ or it gets stressed and nippy.
- Rusty Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Medium care · 24–28 °C (75–82 °F)
- Different pH ranges (6–7.5 vs 7.8–8.5); doable if you sit in the shared band, but not ideal long-term.
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 75 L tank is below the ~150 L this pairing really wants — crowding raises aggression.
- Tanganyikan Butterfly Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Hard care · 24–28 °C (75–82 °F)
- Different pH ranges (6–7.5 vs 8–9); doable if you sit in the shared band, but not ideal long-term.
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 75 L tank is below the ~130 L this pairing really wants — crowding raises aggression.
- Topaz Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Medium care · 23–28 °C (73–82 °F)
- Kribensis and Topaz Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
- Upside-down Catfish⚠️ With cautionPeaceful · 10 cm · Easy care · 22–26 °C (72–79 °F)
- Your 75 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
- Zebra Pleco⚠️ With cautionPeaceful · 10 cm · Hard care · 26–30 °C (79–86 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Alligator Gar⛔ Not recommendedAggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
- Kribensis and Alligator Gar are both territorial and at least one is outright aggressive — expect serious fighting.
- Alligator Gar (250 cm) is big enough to swallow the 10 cm Kribensis whole.
- Your 75 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
- Clown Knifefish⛔ Not recommendedAggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
- Two assertive fish, one genuinely aggressive: Kribensis and Clown Knifefish will hold territory and clash.
- Size gap is too large (90 vs 10 cm): Clown Knifefish will treat Kribensis as food.
- Your 75 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
- Fire Eel⛔ Not recommendedSemi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
- Fire Eel (100 cm) is big enough to swallow the 10 cm Kribensis whole.
- Kribensis and Fire Eel can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 75 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Koi⛔ Not recommendedPeaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
- Koi (90 cm) is big enough to swallow the 10 cm Kribensis whole.
- Your 75 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
- Redtail Catfish⛔ Not recommendedAggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
- Kribensis and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
- Size gap is too large (120 vs 10 cm): Redtail Catfish will treat Kribensis as food.
- Your 75 L tank is below the ~5700 L this pairing really wants — crowding raises aggression.
- Spotted Gar⛔ Not recommendedAggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
- Kribensis and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
- Kribensis is bite-sized to a 90 cm predatory spotted gar — it will be eaten.
- Your 75 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
- Wels Catfish⛔ Not recommendedAggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
- Kribensis and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
- Wels Catfish (300 cm) is big enough to swallow the 10 cm Kribensis whole.
- Your 75 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
- Wolf Cichlid⛔ Not recommendedAggressive · 72 cm · Hard care · 24–30 °C (75–86 °F)
- Two assertive fish, one genuinely aggressive: Kribensis and Wolf Cichlid will hold territory and clash.
- Kribensis is bite-sized to a 72 cm predatory wolf cichlid — it will be eaten.
- Your 75 L tank is below the ~760 L this pairing really wants — crowding raises aggression.
Compatibility is computed from each species' care data — a strong starting point, not a guarantee. Individual temperament varies, so always introduce new fish slowly and watch them.
Kribensis care specs
- Care level
- Easy
- Breeding
- Easy
- Max size
- 10 cm (3.9 in)
- Min tank size
- 75 L (19.8 gal)
- Temperature
- 24–27 °C (75–81 °F)
- pH
- 6–7.5
- Hardness
- 5–20 dGH
- Lifespan
- 5–8 years
- Diet
- Omnivore
- Swim level
- Bottom
- Group size
- 2+ (shoaling)
- Family
- Cichlidae
- Origin
- West Africa — Niger Delta and coastal river systems of Nigeria and Cameroon
What is a kribensis?
The kribensis (Pelvicachromis pulcher), commonly called the krib, is a small West African cichlid that punches well above its size class in colour and personality. Males reach around 10 cm (4 in); females stay a touch smaller at 7–8 cm (3 in). Both sexes carry an olive-yellow body overlaid with a violet iridescent sheen, but the species’ signature feature is the female’s intensely cherry-red belly — a patch that deepens to a vivid magenta when she is ready to spawn. Males develop pointed tips on the dorsal and caudal fins, giving them a slightly more angular silhouette.
Despite belonging to the family Cichlidae, kribs earned their reputation as one of the more community-friendly cichlids: peaceful outside of breeding cycles, manageable in a standard 75-litre community tank, and rated Easy for care. They are a genuine beginner cichlid — rewarding to keep, easy to breed, and striking enough to be the centrepiece of any soft-water community.
Where do kribensis come from?
Kribs are native to West Africa, specifically the Niger Delta and the coastal river systems of Nigeria and Cameroon. In the wild they inhabit slow-moving, heavily vegetated streams and the shallow, shaded margins of rivers where leaf litter accumulates and the substrate is soft sand or fine mud. Water in these habitats is typically soft, slightly acidic to neutral, and stained with tannins from decaying organic matter.
This origin shapes every aspect of good krib husbandry: they want warm water, subdued lighting, a sandy bottom to sift through, and plenty of hiding places that mimic the root tangles and hollow logs of their native habitat. The wild fish also lives in close proximity to caves and crevices — which explains the species’ hard-wired drive to locate and defend a spawning cave the moment a pair bonds.
What size tank does a kribensis need?
The practical minimum for a single bonded pair is 75 litres (20 US gal), and that holds true whether they are kept alone or alongside a small community of dither fish. The floor footprint matters more than water volume: kribs are bottom-dwellers that spend most of their time navigating the lower third of the tank, so a longer, shallower tank beats a tall, narrow one.
For a pair plus a small community of tetras or rasboras, step up to 100–120 litres (26–32 US gal) so that each territory has room to breathe and aggression stays manageable during spawning. Include a fine sand substrate, at least one cave per pair (and a spare), broad-leaved plants like Anubias or Echinodorus, and driftwood or rocks to break sightlines. Avoid strong currents — a gentle sponge filter or a low-flow HOB suits them well.
What water parameters do kribensis need?
- Temperature: 24–27 °C (75–81 °F) — stable tropical warmth, not hot.
- pH: 6.0–7.5, soft to neutral.
- Hardness: 5–20 dGH; they tolerate a moderate range, and captive-bred stock is especially adaptable.
Kribs from the wild come from soft, gently acidic water. Most aquarium-kept kribs are many generations captive-bred, so they handle a wider pH and hardness range than wild fish. That said, very hard, alkaline tap water can suppress their colour and breeding readiness — if your tap water sits above pH 7.5 or 20 dGH, use a portion of RO or rain water to bring parameters closer to their preference. Stability is always the priority: sudden swings stress kribs as much as any cichlid.
What do kribensis eat?
Kribs are omnivores with a slight carnivore lean. In the wild they sift through the substrate for insect larvae, small crustaceans, worms, and plant matter. In the aquarium, a quality cichlid micro-pellet or small sinking pellet works as a daily staple. Supplement generously with:
- Frozen or live foods: bloodworm, daphnia, brine shrimp, and mosquito larvae are all taken eagerly and will condition a pair for breeding.
- Vegetable matter: occasional blanched spinach, spirulina wafers, or sinking algae tabs round out the diet.
Feed small amounts once or twice daily. Because kribs forage at the bottom, make sure food actually sinks rather than being mopped up by surface feeders before it reaches them. Sinking pellets and target feeding with a turkey baster work well. Skip one feeding day per week to keep waste down and digestion healthy.
Are kribensis aggressive — and what fish can live with them?
Kribs are semi-aggressive, with behaviour that shifts considerably between their resting state and their breeding state. Outside of spawning, a bonded pair is generally untroubled by the rest of a community — they stay low, mind their territory, and ignore mid-to-top-water fish entirely. This makes them far more community-friendly than most cichlids.
During breeding, however, the pair becomes a different animal. They will defend a tight perimeter around their cave aggressively, chasing off fish considerably larger than themselves. To keep the peace:
- House them with mid-to-top-water dither fish (ember tetras, harlequin rasboras, rummy-nose tetras) that naturally stay out of the krib’s zone.
- Add corydoras as bottom companions only in larger tanks where the kribs cannot corral the entire floor.
- Avoid other cave-nesting species, other Pelvicachromis species, or similarly shaped and coloured cichlids — kribs treat them as direct rivals.
- Use plants, rocks, and driftwood to break sightlines, so the pair cannot see — and therefore feel compelled to chase — every tank-mate at once.
For a full breakdown of compatible and incompatible species, see Kribensis tank mates.
How do you tell male and female kribensis apart?
Sexing kribs is easier than most cichlids and becomes even more obvious at breeding time. Females are the showier sex when ready to spawn: smaller (7–8 cm / 3 in), deeper-bodied through the belly, and they develop an unmistakable intensely cherry-red to magenta belly patch that is the krib’s most celebrated feature. Males grow larger (up to 10 cm / 4 in), remain slimmer in profile, and have pointed tips on both the dorsal and caudal fins — a reliable marker even in juveniles once they reach about 4–5 cm. Outside of breeding condition, females still show a pinker belly than males, making sexing possible at any time in adults.
How do kribensis breed?
Kribs are one of the easiest cichlids to breed in captivity, earning a Easy difficulty rating. A bonded, healthy pair in good water will typically spawn without much encouragement from the keeper.
The female selects a cave she approves of — she may inspect several before committing — and the male courts her with lateral displays, showing off his colours. Once she enters the cave, spawning occurs inside, hidden from view. The female lays 50–200 adhesive eggs on the cave ceiling or walls, and both parents guard the site, though the female takes primary egg-tending duties while the male patrols the perimeter.
Eggs hatch in roughly 48–72 hours at 25–26 °C. The pair may move the wriggling larvae between pre-dug pits in the substrate for the first few days. Fry become free-swimming around day 5–7, at which point they can take microworms, baby brine shrimp, and finely crushed dry food. Both parents actively shepherd the fry as a family group for several weeks — watching this parental behaviour is one of the most engaging spectacles in freshwater fishkeeping.
To give fry the best survival odds, either move the cave to a dedicated breeding or grow-out tank before spawning, or ensure the main community tank is large enough that fry are not constantly harassed by tank-mates.
What are common kribensis diseases?
Kribs are a robust species and rarely fall ill in a well-maintained tank. The most common health issues are:
- Ich (white spot disease): Fine white salt-like spots across the body and fins, caused by Ichthyophthirius multifiliis. Usually triggered by chilling or stress during transport or water changes. Raise temperature gradually to the upper end of the range and maintain excellent water quality.
- Hexamita / HLLE (hole-in-the-head): Pitting or erosion around the head and lateral line, associated with poor diet, activated carbon overuse, or chronically poor water quality. Address through varied diet, consistent water changes, and removing activated carbon if used long-term.
- Bacterial infections / fin rot: Frayed or receding fins, often secondary to injury from conspecific aggression or poor water quality. Clean water and removing the cause of stress allow mild cases to heal on their own.
- Bloat / internal parasites: Distended belly without a clear breeding cause; more likely in wild-caught stock than in captive-bred fish. Quarantine new fish for at least two weeks before adding them to a community tank.
Prevention is straightforward: keep the tank cycled, perform regular weekly water changes, feed a varied diet, and quarantine new arrivals.
Health note: symptom descriptions here are for general awareness only. Confirm any diagnosis against a reputable veterinary or fish-health resource before treating, and avoid medicating a tank unnecessarily.
How long do kribensis live?
A well-kept krib lives 5–8 years, which is an impressive lifespan for a fish of its size and makes the investment in good setup worthwhile. Wild-type Pelvicachromis pulcher and first-generation captive-bred fish may trend toward the longer end of that range. To reach full lifespan, focus on water quality consistency, a varied and nutritious diet, and giving breeding pairs enough space to cycle in and out of spawning without chronic stress. A krib that is kept well will reward you with years of active foraging, vivid colour, and — if conditions are right — a succession of successful spawns.
Frequently asked questions
Will kribensis be too aggressive for a community tank?
A single pair is fine with similarly sized, mid-to-top-water community fish — think tetras, rasboras, or corydoras. Trouble starts when breeding: the pair defends a tight radius around their cave fiercely. Move the cave to a corner, keep sightlines broken with plants and hardscape, and avoid other bottom-dwellers or similarly shaped fish during spawning bouts.
What kind of cave do kribensis need for breeding?
Any snug, dark enclosure works — ceramic caves, halved coconut shells, upturned clay pots with a small entrance hole, or PVC pipe couplings. The entrance should be just wide enough for one fish; the female will choose the site and guard it tightly once she lays eggs. A sandy substrate lets the pair excavate around the entrance, which they do enthusiastically.
What you need to keep a kribensis
The baseline is a heated, filtered 75 L+ tank: a reliable heater to hold 24–27 °C (75–81 °F), a gentle filter that won't batter a kribensis in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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