Photo: Birger A (CC BY-SA 3.0) — via Wikimedia Commons
Bearded Corydoras (Scleromystax barbatus)
A striking, cooler-water cory from coastal Brazil — bigger than most Corydoras, with bold patterning and a bristly beard on mature males.
Will it live with a Bearded Corydoras?
We compare each fish against your bearded corydoras on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- African Butterfly Cichlid✅ CompatibleSemi-aggressive · 8 cm · Medium care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Agassiz's Dwarf Cichlid✅ CompatibleSemi-aggressive · 9 cm · Medium care · 24–30 °C (75–86 °F)
- Peaceful + Semi-aggressive, 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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Badis✅ CompatibleSemi-aggressive · 8 cm · Medium care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 22–24 °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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Banded Gourami✅ CompatibleSemi-aggressive · 12 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Bearded 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)
- Compatible on the things that matter: shared water near 23–24 °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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Brilliant Rasbora✅ CompatiblePeaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 22–24 °C — no size, zone or temperament conflicts.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Brilliant Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Burmese Loach✅ CompatiblePeaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 22–24 °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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Clown Pleco✅ CompatiblePeaceful · 9 cm · Medium care · 24–28 °C (75–82 °F)
- Both are peaceful, 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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Cockatoo Dwarf Cichlid✅ CompatibleSemi-aggressive · 8 cm · Medium care · 24–28 °C (75–82 °F)
- Peaceful + Semi-aggressive, 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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Giant Betta✅ CompatiblePeaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
- Both are peaceful, and their water overlaps around 24–24 °C — no size, zone or temperament conflicts.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Giant Kuhli Loach✅ CompatiblePeaceful · 12 cm · Easy care · 24–30 °C (75–86 °F)
- Both are peaceful, 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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Golden Wonder Killifish✅ CompatibleSemi-aggressive · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keyhole Cichlid✅ CompatiblePeaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 22–24 °C — no size, zone or temperament conflicts.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Kribensis✅ CompatibleSemi-aggressive · 10 cm · Easy care · 24–27 °C (75–81 °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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Kuhli Loach✅ CompatiblePeaceful · 10 cm · Easy care · 24–30 °C (75–86 °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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Molly✅ CompatiblePeaceful · 10 cm · Easy care · 23–28 °C (73–82 °F)
- Both are peaceful, and their water overlaps around 23–24 °C — no size, zone or temperament conflicts.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Murray River Rainbowfish✅ CompatiblePeaceful · 11 cm · Easy care · 15–26 °C (59–79 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Murray River Rainbowfish in a shoal of 6+ or it gets stressed and nippy.
- Paradise Fish✅ CompatibleAggressive · 10 cm · Medium care · 16–26 °C (61–79 °F)
- Peaceful + Aggressive, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Porthole Catfish✅ CompatiblePeaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 22–24 °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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Rosy Barb✅ CompatibleSemi-aggressive · 10 cm · Easy care · 18–26 °C (64–79 °F)
- Compatible on the things that matter: shared water near 18–24 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Rosy Barb 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)
- Both are peaceful, and their water overlaps around 20–24 °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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Thick-lipped Gourami✅ CompatiblePeaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Tiger Betta✅ CompatibleSemi-aggressive · 11 cm · Hard care · 22–27 °C (72–81 °F)
- Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Topaz Cichlid✅ CompatibleSemi-aggressive · 10 cm · Medium care · 23–28 °C (73–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Keep Bearded 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 (Bearded Corydoras 6–7.6 vs Afra Cichlid 7.8–8.6) — target the overlap and acclimate slowly.
- Your 80 L tank is below the ~150 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Afra Cichlid in a shoal of 6+ or it gets stressed and nippy.
- Auratus Cichlid⚠️ With cautionAggressive · 11 cm · Medium care · 23–28 °C (73–82 °F)
- Your 80 L tank is below the ~190 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Auratus 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)
- Your 80 L tank is below the ~150 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Bandit Cichlid in a shoal of 6+ or it gets stressed and nippy.
- Boesemani Rainbowfish⚠️ With cautionPeaceful · 11 cm · Medium care · 24–28 °C (75–82 °F)
- Your 80 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Boesemani Rainbowfish 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 (Bearded Corydoras 6–7.6 vs Brichardi Cichlid 7.8–9) — target the overlap and acclimate slowly.
- Your 80 L tank is below the ~120 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)
- Your 80 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Clown Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Convict Cichlid⚠️ With cautionAggressive · 10 cm · Easy care · 21–28 °C (70–82 °F)
- Your 80 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras 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 (6–7.6 vs 7.8–9); doable if you sit in the shared band, but not ideal long-term.
- Your 80 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Demasoni Cichlid⚠️ With cautionAggressive · 9 cm · Hard care · 23–27 °C (73–81 °F)
- pH preferences only just meet (Bearded Corydoras 6–7.6 vs Demasoni Cichlid 7.8–8.6) — target the overlap and acclimate slowly.
- Your 80 L tank is below the ~200 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Demasoni Cichlid in a shoal of 12+ or it gets stressed and nippy.
- Electric Yellow Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Medium care · 23–26 °C (73–79 °F)
- pH preferences only just meet (Bearded Corydoras 6–7.6 vs Electric Yellow Cichlid 7.8–8.9) — target the overlap and acclimate slowly.
- Your 80 L tank is below the ~200 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Giant Danio⚠️ With cautionPeaceful · 10 cm · Easy care · 20–27 °C (68–81 °F)
- Your 80 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Giant Danio in a shoal of 6+ or it gets stressed and nippy.
- Johanni Cichlid⚠️ With cautionAggressive · 10 cm · Medium care · 24–28 °C (75–82 °F)
- Different pH ranges (6–7.6 vs 7.8–8.6); doable if you sit in the shared band, but not ideal long-term.
- Your 80 L tank is below the ~200 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Keep Johanni Cichlid in a shoal of 6+ or it gets stressed and nippy.
- Lifalili Jewel Cichlid⚠️ With cautionAggressive · 9 cm · Medium care · 22–28 °C (72–82 °F)
- Your 80 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras 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 (6–7.6 vs 7.8–8.5); doable if you sit in the shared band, but not ideal long-term.
- Your 80 L tank is below the ~150 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Tanganyikan Butterfly Cichlid⚠️ With cautionSemi-aggressive · 10 cm · Hard care · 24–28 °C (75–82 °F)
- Different pH ranges (6–7.6 vs 8–9); doable if you sit in the shared band, but not ideal long-term.
- Your 80 L tank is below the ~130 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Upside-down Catfish⚠️ With cautionPeaceful · 10 cm · Easy care · 22–26 °C (72–79 °F)
- Your 80 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Blackthroat Cichlid⛔ Not recommendedAggressive · 25 cm · Hard care · 26–30 °C (79–86 °F)
- Temperature needs don't overlap (Bearded Corydoras 18–24 °C vs Blackthroat Cichlid 26–30 °C).
- Blackthroat Cichlid may bully the smaller Bearded Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 80 L tank is below the ~400 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Clown Loach⛔ Not recommendedPeaceful · 30 cm · Medium care · 25–30 °C (77–86 °F)
- Temperature needs don't overlap (Bearded Corydoras 18–24 °C vs Clown Loach 25–30 °C).
- Clown Loach may bully the smaller Bearded Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 80 L tank is below the ~400 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Flowerhorn Cichlid⛔ Not recommendedAggressive · 30 cm · Medium care · 25–30 °C (77–86 °F)
- Temperature needs don't overlap (Bearded Corydoras 18–24 °C vs Flowerhorn Cichlid 25–30 °C).
- Flowerhorn Cichlid may bully the smaller Bearded Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 80 L tank is below the ~340 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Jaguar Cichlid⛔ Not recommendedAggressive · 55 cm · Hard care · 25–30 °C (77–86 °F)
- Temperature needs don't overlap (Bearded Corydoras 18–24 °C vs Jaguar Cichlid 25–30 °C).
- Jaguar Cichlid may bully the smaller Bearded Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 80 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Mango Pleco⛔ Not recommendedSemi-aggressive · 28 cm · Hard care · 25–32 °C (77–90 °F)
- Temperature needs don't overlap (Bearded Corydoras 18–24 °C vs Mango Pleco 25–32 °C).
- Mango Pleco may bully the smaller Bearded Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 80 L tank is below the ~265 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Nile Bichir⛔ Not recommendedSemi-aggressive · 70 cm · Medium care · 25–28 °C (77–82 °F)
- Temperature needs don't overlap (Bearded Corydoras 18–24 °C vs Nile Bichir 25–28 °C).
- Nile Bichir may bully the smaller Bearded Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 80 L tank is below the ~450 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Ringtail Pike Cichlid⛔ Not recommendedAggressive · 28 cm · Hard care · 25–30 °C (77–86 °F)
- Temperature needs don't overlap (Bearded Corydoras 18–24 °C vs Ringtail Pike Cichlid 25–30 °C).
- Ringtail Pike Cichlid may bully the smaller Bearded Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 80 L tank is below the ~250 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Spotted Severum⛔ Not recommendedSemi-aggressive · 25 cm · Medium care · 26–30 °C (79–86 °F)
- Temperature needs don't overlap (Bearded Corydoras 18–24 °C vs Spotted Severum 26–30 °C).
- Spotted Severum may bully the smaller Bearded Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Your 80 L tank is below the ~300 L this pairing really wants — crowding raises aggression.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
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.
Bearded Corydoras care specs
- Care level
- Medium
- Breeding
- Medium
- Max size
- 10 cm (3.9 in)
- Min tank size
- 80 L (21.1 gal)
- Temperature
- 18–24 °C (64–75 °F)
- pH
- 6–7.6
- Hardness
- 2–15 dGH
- Lifespan
- 5–8 years
- Diet
- Omnivore
- Swim level
- Bottom
- Group size
- 6+ (shoaling)
- Family
- Callichthyidae
- Origin
- Atlantic coastal rivers of south-east Brazil (Rio de Janeiro to São Paulo states)
What is a Bearded Corydoras?
The bearded corydoras (Scleromystax barbatus) is one of the largest and most visually distinctive members of the armoured-catfish family Callichthyidae, reaching up to 10 cm (4 in) — noticeably bigger than the common bronze or peppered cory most hobbyists are familiar with. Its olive-brown flanks are marked with irregular dark crossbands and a scattering of iridescent flecks, making it a genuinely attractive bottom-dweller rather than a background novelty.
What truly sets this species apart is the adult male’s face: dense odontode bristles — stiff, keratinous spines — erupt across the snout and cheeks, producing the bristled “beard” that gives the fish its common name. No other commonly kept cory pulls off this look.
Crucially, Scleromystax barbatus is a temperate fish, not a tropical one. Its coastal Brazilian home rivers are cool and oxygen-rich, and keeping it in a standard tropical tank running at 26–28 °C will shorten its life. Get the temperature right and you are rewarded with a robust, personable shoaling catfish that can live 5–8 years — a genuine long-term aquarium resident.
Where do Bearded Corydoras come from?
Scleromystax barbatus is endemic to the Atlantic coastal drainages of south-east Brazil, primarily river systems in Rio de Janeiro and São Paulo states. Its native streams are clear-to-moderately-tannin-stained, well-oxygenated, and seasonally cool — driven by altitude, the Atlantic forest canopy, and the temperate latitude of the south-east Brazilian coast.
The substrate is typically sand or fine gravel mixed with leaf litter, and moderate current is the norm. Water chemistry in these systems is soft to moderately hard and slightly acidic to neutral — matching the frontmatter values of pH 6.0–7.6 and hardness 2–15 dGH. Wild fish live in groups, rooting through leaf litter and sandy sediment for invertebrates and organic matter. Replicating these conditions — cooler water, good flow, soft substrate, low-to-moderate lighting — is the core of good bearded cory husbandry.
What size tank do Bearded Corydoras need and how should it be set up?
The minimum recommended tank is 80 litres (approximately 21 gallons), and this assumes a group of six — the minimum that allows natural shoaling behaviour. A 100–120 L (26–32 gal) tank is more comfortable and makes water-quality management easier given this species’ moderate bioload and active feeding.
Footprint matters more than height: bearded cories are exclusively bottom-dwellers and need horizontal space to patrol. A tank that is long and wide is far better than a tall, narrow column.
Substrate: Fine sand is essential. Bearded cories forage by sifting substrate through their mouths, and the sensitive barbels are damaged by coarse gravel over time. Pool filter sand or speciality aquarium sand works well.
Filtration and flow: High oxygenation is non-negotiable given this species’ cool, fast-flowing origin. An external canister filter or a hang-on-back filter with moderate to strong flow suits them well. Adding a powerhead or a spray bar to increase surface agitation benefits long-term health. Avoid dead spots where detritus accumulates — bearded cories are messy eaters and regular gravel vacuuming matters.
Decor: Driftwood, smooth river stones, broad-leaved plants (Anubias, Java fern), and patches of leaf litter create a natural environment and provide the dimly lit resting spots the species uses during the day. Dense planting or floating plants to moderate lighting is appreciated.
What water parameters do Bearded Corydoras need?
- Temperature: 18–24 °C (64–75 °F). The ideal long-term range is 20–22 °C (68–72 °F). This is the single most important parameter: sustained temperatures above 24 °C stress this species and increase disease susceptibility. In many temperate climates, no heater is needed — but a heater set to 20–22 °C protects against cold snaps.
- pH: 6.0–7.6. The species is adaptable across this range; neutral (7.0) is a safe target.
- Hardness: 2–15 dGH — soft to moderately hard. Extremely hard tap water should be cut with RO water.
- Ammonia / nitrite: zero, always.
- Nitrate: keep below 20–25 ppm with regular water changes.
Weekly partial water changes of 25–30% are the backbone of keeping this fish healthy. Cold tap water used during changes is less of a problem here than in tropical setups — the slight temperature dip from a partial change closely mimics natural stream conditions and is generally tolerated well.
What do Bearded Corydoras eat?
Bearded cories are omnivores that forage across the bottom, sifting sand and leaf litter for anything edible. In the aquarium they are unfussy feeders that accept a wide range of foods, but variety improves condition and colour.
Recommended diet:
- High-quality sinking pellets or wafers as a staple (look for those with a significant protein content — these are larger fish and need more than a pure vegetable-based wafer).
- Frozen or live bloodworms, tubifex, and daphnia — offered two to three times a week.
- Sinking catfish tablets for the bottom-dwelling specific nutritional profile.
- Blanched vegetables (courgette, cucumber, spinach) are occasionally accepted and add fibre.
Feed in the evening when the fish are most active. Drop food directly to the bottom and ensure it reaches the cories rather than being hoovered up by mid-water tank-mates first. Remove uneaten food within a few hours to preserve water quality.
Are Bearded Corydoras peaceful — and what fish can they live with?
Bearded cories are peaceful, shoaling fish with no predatory intent toward tank-mates. They will not harass other species and ignore mid-water or surface fish entirely. Within the group, males may posture and “wrestle” briefly, but this is display behaviour rather than serious aggression and rarely causes injury.
Keep a minimum of six together — smaller groups produce noticeably more timid, stressed fish that hide excessively and fail to thrive.
The critical constraint on tank-mates is temperature: at 18–24 °C, most standard tropical community fish are simply too cold. Suitable companions are other cool-water or wide-temperature-range species: hillstream loaches, rosy barbs, white cloud mountain minnows, weather loaches, and other cool-tolerant bottom-dwellers. Avoid tetras, gouramis, discus, and most other fish that need 26 °C or higher.
For a full breakdown of pairings, see Bearded Corydoras tank mates.
How do you tell male from female Bearded Corydoras apart?
Sexual dimorphism in Scleromystax barbatus is among the most pronounced of any cory-type catfish and becomes apparent as fish mature.
Males are typically larger (often approaching the full 10 cm / 4 in), and — most distinctively — develop dense odontode bristles on the snout, cheeks, and sometimes the leading pectoral-fin spines. These bristles intensify with age and are the source of the “bearded” common name. Males can look almost aggressively decorated compared to the streamlined females.
Females are slightly smaller on average, lack the facial bristles entirely, and have a noticeably broader, rounder body profile when viewed from above — particularly when gravid with eggs. This ventral fullness is the clearest visual cue outside of the obvious bristle difference.
Juveniles under about 5–6 cm are difficult to sex reliably; the bristles begin to emerge in males as they approach adult size.
How do Bearded Corydoras breed?
Bearded cories are egg scatterers that breed in a manner typical of the Callichthyidae family, though the process has some nuances worth knowing.
Spawning is usually triggered by a drop in water temperature — mimicking the seasonal cool-water influx of their native streams. Performing a larger water change with slightly cooler water (a few degrees below the tank’s current temperature) often stimulates spawning behaviour within 24–48 hours. Conditioning the group on high-quality live or frozen foods in the weeks prior improves success.
During spawning, males compete for females. The female deposits eggs against the glass, on broad plant leaves, or on smooth surfaces, clasping them briefly in her ventral fins before pressing them into place. Eggs are relatively large for a cory-type fish. Once spawning is complete, the adults show no further parental care and will eat eggs if left with them.
For a dedicated breeding attempt: move eggs to a separate shallow container with gentle aeration, a few drops of methylene blue to inhibit fungus, and a temperature of around 20–22 °C. Eggs typically hatch within 4–6 days. Early-stage fry need infusoria or commercial liquid fry food, graduating to microworms and finely crushed flake within the first couple of weeks.
What diseases are common in Bearded Corydoras?
Scleromystax barbatus is a hardy species when kept in appropriate conditions, but several problems arise predictably from husbandry errors.
Barbel erosion / barbel rot: The most common cory-specific issue. Caused by sharp or rough substrate and — especially — bacterial populations that build up in dirty substrate. Switch to fine sand, vacuum regularly, and keep nitrates low. Barbels often regenerate if the cause is caught early.
Red blotch disease (bacterial haemorrhagic septicaemia): Red streaking on the skin or fins, usually associated with poor water quality or physical injury. Prevention is straightforward: maintain clean, well-oxygenated water and remove any sharp decor.
Ich (white spot): White salt-grain spots on body and fins. Bearded cories are susceptible when chilled below their minimum or when introduced to an uncycled tank. Quarantine all new fish before adding them to the display tank.
Heat stress: Not a disease per se, but overheating is the leading long-term killer of this species in home aquaria. Any sustained temperature above 25–26 °C will suppress immune function and reduce lifespan. Monitor temperature year-round and plan for summer heat if you keep them in a room without climate control.
Health note: disease identification and medication dosing are beyond the scope of a care profile. For a sick fish, cross-reference symptoms against a reputable veterinary or fish-health source before treating — and fix water quality first, as the majority of catfish ailments trace directly back to poor conditions.
How long do Bearded Corydoras live?
A well-kept Scleromystax barbatus lives 5–8 years, which puts it toward the longer end of common aquarium catfish. The key to reaching that upper range is straightforward: keep the temperature in the 20–22 °C sweet spot, maintain pristine water quality with regular partial changes, feed a varied diet, and keep the fish in a group of at least six.
Many specimens in overly warm tanks decline within two to three years — not from acute illness but from cumulative thermal stress. Get the temperature right from the start and this is a species that genuinely repays the commitment with years of active, interesting behaviour on the tank floor.
Frequently asked questions
Why does my bearded corydoras need cooler water?
Scleromystax barbatus comes from fast-flowing, well-oxygenated coastal streams in temperate south-east Brazil that rarely exceed 24 °C. Keeping water above 26 °C stresses them, shortens lifespan, and makes them prone to infection. A temperature of 20–22 °C is ideal for long-term health.
Is the bearded corydoras the same as a regular Corydoras?
No — Scleromystax is a closely related but distinct genus in the family Callichthyidae. Scleromystax barbatus grows larger than most Corydoras species, prefers cooler temperatures, and males display impressive facial bristles absent in true Corydoras.
What you need to keep a bearded corydoras
The baseline is a heated, filtered 80 L+ tank: a reliable heater to hold 18–24 °C (64–75 °F), a gentle filter that won't batter a bearded corydoras in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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