Photo: Guérin Nicolas (messages) (CC BY-SA 3.0) — via Wikimedia Commons
Agassiz's Dwarf Cichlid (Apistogramma agassizii)
A jewel-coloured Amazonian dwarf cichlid with a bold personality packed into a pocket-sized frame — the classic entry point to the Apistogramma genus.
Will it live with a Agassiz's Dwarf Cichlid?
We compare each fish against your agassiz's dwarf cichlid 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)
- 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 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 24–28 °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.
- Black Kuhli Loach✅ CompatiblePeaceful · 8 cm · Easy care · 23–28 °C (73–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–28 °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.
- Blood Red Tiger Pleco✅ CompatiblePeaceful · 6 cm · Medium care · 24–29 °C (75–84 °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.
- Bolivian Ram✅ CompatiblePeaceful · 8 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.
- 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)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–28 °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.
- 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)
- 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 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 24–28 °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)
- 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 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; 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.
- Giant Betta✅ CompatiblePeaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- 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)
- 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.
- Kuhli Loach✅ CompatiblePeaceful · 10 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.
- Leopard Frog Pleco✅ CompatiblePeaceful · 9 cm · Medium care · 25–30 °C (77–86 °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.
- Murray River Rainbowfish✅ CompatiblePeaceful · 11 cm · Easy care · 15–26 °C (59–79 °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.
- 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.
- Rio Negro Checkerboard Cichlid✅ CompatiblePeaceful · 7 cm · Hard care · 24–29 °C (75–84 °F)
- Compatible on the things that matter: shared water near 24–29 °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.
- Slate Corydoras✅ CompatiblePeaceful · 6 cm · Medium care · 23–28 °C (73–82 °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.
- 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, 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.
- 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)
- 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.
- 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 24–30 °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 (Agassiz's Dwarf Cichlid 5–7 vs Afra Cichlid 7.8–8.6) — target the overlap and acclimate slowly.
- One likes softer water and the other harder (0–8 vs 10–20 dGH) — a compromise, not a perfect match.
- Agassiz's Dwarf Cichlid 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.
- Bandit Cichlid⚠️ With cautionSemi-aggressive · 9 cm · Medium care · 22–26 °C (72–79 °F)
- Agassiz's Dwarf Cichlid and Bandit 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 Bandit 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.
- Brichardi Cichlid⚠️ With cautionSemi-aggressive · 9 cm · Medium care · 24–28 °C (75–82 °F)
- pH preferences only just meet (Agassiz's Dwarf Cichlid 5–7 vs Brichardi Cichlid 7.8–9) — target the overlap and acclimate slowly.
- One likes softer water and the other harder (0–8 vs 10–20 dGH) — a compromise, not a perfect match.
- Agassiz's Dwarf Cichlid and Brichardi Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 75 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Brilliant Rasbora⚠️ With cautionPeaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
- Agassiz's Dwarf Cichlid is semi-aggressive and may chase or nip the smaller Brilliant Rasbora — plant heavily and break up sight lines.
- Keep Brilliant Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Clown Pleco⚠️ With cautionPeaceful · 9 cm · Medium care · 24–28 °C (75–82 °F)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Clown Rasbora⚠️ With cautionPeaceful · 10 cm · Medium care · 23–28 °C (73–82 °F)
- 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 (5–7 vs 7.8–9); doable if you sit in the shared band, but not ideal long-term.
- Water hardness preferences differ (Agassiz's Dwarf Cichlid 0–8 vs Daffodil Cichlid 10–20 dGH).
- 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 (Agassiz's Dwarf Cichlid 5–7 vs Electric Yellow Cichlid 7.8–8.9) — target the overlap and acclimate slowly.
- One likes softer water and the other harder (0–8 vs 10–20 dGH) — a compromise, not a perfect match.
- Agassiz's Dwarf Cichlid 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)
- 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)
- Agassiz's Dwarf Cichlid 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)
- Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
- Mexican Tetra⚠️ With cautionSemi-aggressive · 9 cm · Easy care · 18–25 °C (64–77 °F)
- 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 ~110 L this pairing really wants — crowding raises aggression.
- Keep Mexican Tetra in a shoal of 6+ or it gets stressed and nippy.
- Silver Tetra⚠️ With cautionPeaceful · 9 cm · Easy care · 24–28 °C (75–82 °F)
- Agassiz's Dwarf Cichlid is semi-aggressive and may chase or nip the smaller Silver Tetra — plant heavily and break up sight lines.
- Your 75 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
- Keep Silver Tetra in a shoal of 6+ or it gets stressed and nippy.
- Thick-lipped Gourami⚠️ With cautionPeaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
- Agassiz's Dwarf Cichlid is semi-aggressive and may chase or nip the smaller Thick-lipped Gourami — plant heavily and break up sight lines.
- Zebra Loach⚠️ With cautionPeaceful · 9 cm · Medium care · 23–26 °C (73–79 °F)
- Your 75 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
- Alligator Gar⛔ Not recommendedAggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
- Agassiz's Dwarf Cichlid 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 9 cm Agassiz's Dwarf Cichlid 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: Agassiz's Dwarf Cichlid and Clown Knifefish will hold territory and clash.
- Clown Knifefish (90 cm) is big enough to swallow the 9 cm Agassiz's Dwarf Cichlid whole.
- 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)
- Agassiz's Dwarf Cichlid is bite-sized to a 100 cm predatory fire eel — it will be eaten.
- Agassiz's Dwarf Cichlid 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)
- Size gap is too large (90 vs 9 cm): Koi will treat Agassiz's Dwarf Cichlid as food.
- One likes softer water and the other harder (0–8 vs 9–18 dGH) — a compromise, not a perfect match.
- 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)
- Agassiz's Dwarf Cichlid and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
- Redtail Catfish (120 cm) is big enough to swallow the 9 cm Agassiz's Dwarf Cichlid whole.
- 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)
- Agassiz's Dwarf Cichlid and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
- Spotted Gar (90 cm) is big enough to swallow the 9 cm Agassiz's Dwarf Cichlid whole.
- 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)
- Agassiz's Dwarf Cichlid and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
- Size gap is too large (300 vs 9 cm): Wels Catfish will treat Agassiz's Dwarf Cichlid as food.
- 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: Agassiz's Dwarf Cichlid and Wolf Cichlid will hold territory and clash.
- Agassiz's Dwarf Cichlid 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.
Agassiz's Dwarf Cichlid care specs
- Care level
- Medium
- Breeding
- Medium
- Max size
- 9 cm (3.5 in)
- Min tank size
- 75 L (19.8 gal)
- Temperature
- 24–30 °C (75–86 °F)
- pH
- 5–7
- Hardness
- 0–8 dGH
- Lifespan
- 3–5 years
- Diet
- Carnivore
- Swim level
- Bottom
- Group size
- 2+ (shoaling)
- Family
- Cichlidae
- Origin
- South America — Amazon River basin (Brazil, Peru, Colombia)
What is Agassiz’s Dwarf Cichlid?
Agassiz’s dwarf cichlid (Apistogramma agassizii) is a small but visually striking South American cichlid that consistently ranks among the most popular members of the sprawling Apistogramma genus. Males top out at roughly 9 cm (3.5 in) and are among the most colourful freshwater fish in the hobby — iridescent blue-green flanks, a warm yellow belly, and a distinctive lyre-shaped tail with elongated upper and lower lobes. Females are noticeably smaller and trade spectacle for camouflage: a rich yellow body with a sharp black cheek stripe that becomes even more vivid when guarding eggs.
Wild-type fish are widely available, and breeders have also developed colour morphs — red-tail, double-red, fire — all sold under the agassizii name. Regardless of form, the species is a bottom-dwelling cave spawner with a defined territory, a genuine personality, and just enough attitude to keep a fishkeeper engaged without becoming a management headache.
Where do Agassiz’s Dwarf Cichlids come from in the wild?
Wild A. agassizii are distributed broadly across the Amazon basin in Brazil, Peru and Colombia, inhabiting shallow, slow-moving blackwater streams, seasonally flooded forest margins and leaf-litter pools. These habitats are stained dark with tannins, typically very soft (near-zero hardness), warm, and acidic — pH values between 4 and 5.5 are not unusual in the core range.
The species was described in 1875 and named for naturalist Louis Agassiz. Most fish in the hobby today are captive-bred over many generations, which has broadened their tolerance somewhat, but understanding their blackwater origin remains the key to keeping them in peak condition.
What size tank does Agassiz’s Dwarf Cichlid need?
The practical minimum is 75 litres (20 gallons), and a longer footprint — 90 cm (36 in) or more — is preferred over a tall one. A. agassizii lives and hunts at the bottom, so horizontal territory matters far more than depth. A wider floor also makes it easier to divide the space into distinct visual zones, which is essential for managing territorial tension.
Furnish the tank generously: smooth river sand or fine gravel substrate, driftwood, clusters of dried leaf litter (Indian almond or oak leaves), and at least two or three caves per female. Dense planting along the sides and back provides refuge for tank-mates and visually reduces territory overlap. A dimmer, tannin-stained setup reduces stress and brings out the species’ best colour.
What water parameters do Agassiz’s Dwarf Cichlids need?
- Temperature: 24–30 °C (75–86 °F). Most keepers target 26–28 °C as a comfortable middle ground.
- pH: 5.0–7.0. Fish kept at or below pH 6.5 show noticeably better colour and breed more readily.
- Hardness: 0–8 dGH. Soft water is strongly preferred; very hard tap water should be cut with RO or rainwater.
Stability is as important as hitting the right numbers. Gradual conditioning using peat filtration, driftwood or Indian almond leaves is a practical way to lower pH and tannin-stain the water without abrupt swings. Weekly water changes of 20–30% using temperature-matched water keep nitrates in check without shocking the fish.
What do Agassiz’s Dwarf Cichlids eat?
These are carnivores that pick invertebrates, worms and insect larvae from the substrate and leaf litter in the wild. In the aquarium, a varied protein diet produces the best colour and condition:
- Staple: high-protein micro-pellets or small cichlid pellets.
- Enrichment: frozen or live bloodworms, brine shrimp, daphnia and cyclops — offered several times a week.
- Occasional: live blackworms or small earthworm pieces, especially useful for conditioning breeding pairs.
Feed small amounts once or twice a day. Because they hunt at the bottom, ensure food reaches the substrate rather than being intercepted by upper-level fish.
How do Agassiz’s Dwarf Cichlids behave — and what fish can live with them?
A. agassizii is classed as semi-aggressive, and the aggression is almost entirely territory-driven. Males will fight if their territories overlap, so keep one male per tank at the 75 L minimum, or provide a very large, heavily broken-up aquascape if attempting two males. Females are smaller, less aggressive overall, but will defend a cave site vigorously once they are brooding.
The bottom zone belongs to the cichlid and should not be crowded with other bottom-dwellers. Small, peaceful mid- and upper-level species make the best companions: neon tetras, ember tetras, rummy-nose tetras, hatchetfish, pencilfish and similar soft-water community fish are all reliable choices. Corydoras work in many setups but may be harassed near a brooding female’s cave — watch carefully. Avoid large or boisterous cichlids, fin-nippers, and any species that competes for the same territory.
For a curated, filterable list of proven pairings, see Agassiz’s Dwarf Cichlid tank mates.
How do you tell male from female Agassiz’s Dwarf Cichlids apart?
Sexual dimorphism in this species is pronounced and makes sexing straightforward once the fish have coloured up. Males grow larger (up to 9 cm / 3.5 in), display the full iridescent blue-green body, bright yellow belly and the signature lyre-shaped tail with elongated lobes on the top and bottom fin rays. The dorsal fin also shows extended anterior rays. Females are typically around 4–5 cm (1.5–2 in) at maturity, predominantly yellow, and carry a bold black cheek stripe. When brooding, females intensify to vivid yellow-black and become overtly defensive. At juvenile size the sexes can be difficult to distinguish; wait until fish are at least 3–4 months old and showing adult patterning before making pairings.
How do Agassiz’s Dwarf Cichlids breed?
A. agassizii is a cave spawner — the female selects a small cave, terracotta pot or coconut shell, lays a clutch of eggs (typically 50–150) on the ceiling or walls, and assumes virtually sole responsibility for guarding and fanning the eggs. The male defends the outer territory perimeter.
To encourage spawning: raise the temperature toward 28–30 °C (82–86 °F), condition both sexes for two to three weeks on live or frozen foods, and provide multiple cave options. Eggs hatch in roughly 48–72 hours; fry become free-swimming after another three to five days and follow the female closely. First foods are infusoria and baby brine shrimp nauplii. Remove the male if he disrupts parental care. Breeding difficulty is rated medium — the behaviour is rewarding to observe but managing a pair in a community tank requires careful planning.
What diseases affect Agassiz’s Dwarf Cichlids?
The diseases most commonly seen in A. agassizii are the same ones that affect soft-water cichlids generally:
- Ich (white spot): small white grains on fins and body, typically triggered by a temperature drop or transport stress. Prevention is stable, warm water and proper quarantine for new fish.
- Hexamita / hole-in-the-head: internal flagellate infection causing pitting near the lateral line. Poor water quality and monotonous diet are the main risk factors.
- Bacterial infections: frayed fins or cloudy eyes usually signal secondary infection following physical injury or water-quality decline. Keep aggression managed and water clean.
- Oodinium (velvet): gold-dust shimmer with rapid gill movement; most often introduced via insufficiently quarantined arrivals.
Prevention across all four is consistent: quarantine new fish for at least four weeks, keep up with water changes, avoid abrupt temperature or pH swings, and feed a varied diet.
Health note: medication dosing and disease diagnosis are beyond the scope of this care profile. For a sick fish, cross-reference symptoms against a reputable veterinary or aquatic-health resource before treating.
How long do Agassiz’s Dwarf Cichlids live?
With attentive care, A. agassizii typically lives 3–5 years in the aquarium. That lifespan is achievable when the fish are kept in appropriately soft, clean water, fed a varied protein-rich diet, and not subjected to chronic stress from incompatible tank-mates or declining water quality. Captive-bred fish from a reputable source give you the full clock to work with. A male in prime condition — fins fully expressed, colours saturated — is one of the finest sights in a freshwater aquarium.
Frequently asked questions
How aggressive are Agassiz's dwarf cichlids toward other fish?
Males are territorial toward each other and will spar, so keep only one male per tank unless the tank is very large with visual barriers. They are generally fine with small, fast upper-level fish like tetras and rasboras that stay out of the bottom zone.
Do Agassiz's dwarf cichlids need soft, acidic water?
Yes. In the wild they inhabit blackwater streams with pH as low as 4–5 and near-zero hardness. In captivity they adapt to pH up to 7.0, but they colour up best, breed most readily, and live longest in soft, slightly acidic water below pH 6.5.
What you need to keep a agassiz's dwarf cichlid
The baseline is a heated, filtered 75 L+ tank: a reliable heater to hold 24–30 °C (75–86 °F), a gentle filter that won't batter a agassiz's dwarf cichlid in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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