Black Collared Catfish Tank Mates
Black Collared Catfish is semi-aggressive, so its tank mates need choosing with care. Here are the 8 freshwater species that pair well with a black collared catfish — plus the 217 to avoid — with a live checker you can tune to your own tank.
The best tank mates for a black collared catfish
- Bristlenose Pleco ✅ CompatibleEasy care · Peaceful · 12 cm · 23–30 °C (73–86 °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.
- Rubber Lip Pleco ✅ CompatibleEasy care · Peaceful · 12 cm · 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.
- Marbled Hoplo ✅ CompatibleEasy care · Peaceful · 14 cm · 22–28 °C (72–82 °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.
- Spotted Talking Catfish ✅ CompatibleEasy care · Peaceful · 15 cm · 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.
- Weather Loach ✅ CompatibleEasy care · Peaceful · 25 cm · 5–24 °C (41–75 °F)Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–24 °C — no size, zone or temperament conflicts.
- Spotted Rubbernose Pleco ✅ CompatibleMedium care · Peaceful · 12 cm · 20–26 °C (68–79 °F)Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–25 °C — no size, zone or temperament conflicts.
- Snowball Pleco ✅ CompatibleMedium care · Peaceful · 16 cm · 24–30 °C (75–86 °F)Compatible on the things that matter: shared water near 24–25 °C, workable temperaments, and no predator-and-prey size gap.
- Elephant-nose Knifefish ✅ CompatibleHard care · Peaceful · 35 cm · 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.
Black Collared Catfish tank mates that can work with care
- Adolf's Cory ⚠️ With cautionMedium care · Peaceful · 5.5 cm · 22–26 °C (72–79 °F)Black Collared Catfish may bully the smaller Adolf's Cory, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Agassiz's Corydoras ⚠️ With cautionEasy care · Peaceful · 6 cm · 22–28 °C (72–82 °F)Black Collared Catfish may bully the smaller Agassiz's Corydoras, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Altifrons Geophagus ⚠️ With cautionMedium care · Semi-aggressive · 25 cm · 24–28 °C (75–82 °F)Black Collared Catfish and Altifrons Geophagus can both be territorial; doable with space and dense planting, but watch for chasing.
- Angelfish ⚠️ With cautionMedium care · Semi-aggressive · 15 cm · 24–30 °C (75–86 °F)Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Angelicus Synodontis ⚠️ With cautionMedium care · Semi-aggressive · 25 cm · 23–27 °C (73–81 °F)Black Collared Catfish and Angelicus Synodontis can both be territorial; doable with space and dense planting, but watch for chasing.
- Assassin Snail ⚠️ With cautionEasy care · Peaceful · 3 cm · 22–26 °C (72–79 °F)Black Collared Catfish may bully the smaller Assassin Snail, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Axelrod's Cory ⚠️ With cautionEasy care · Peaceful · 5 cm · 23–28 °C (73–82 °F)Black Collared Catfish may bully the smaller Axelrod's Cory, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
- Banded Gourami ⚠️ With cautionEasy care · Semi-aggressive · 12 cm · 22–28 °C (72–82 °F)Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
+ 107 more “with caution” pairings — see the interactive checker above.
Fish to avoid keeping with a black collared catfish
- Wels Catfish ⛔ AvoidHard care · Aggressive · 300 cm · 15–25 °C (59–77 °F)Two assertive fish, one genuinely aggressive: Black Collared Catfish and Wels Catfish will hold territory and clash.
- Alligator Gar ⛔ AvoidHard care · Aggressive · 250 cm · 24–28 °C (75–82 °F)Two assertive fish, one genuinely aggressive: Black Collared Catfish and Alligator Gar will hold territory and clash.
- Redtail Catfish ⛔ AvoidHard care · Aggressive · 120 cm · 24–27 °C (75–81 °F)Two assertive fish, one genuinely aggressive: Black Collared Catfish and Redtail Catfish will hold territory and clash.
- Fire Eel ⛔ AvoidMedium care · Semi-aggressive · 100 cm · 24–28 °C (75–82 °F)Size gap is too large (100 vs 27 cm): Fire Eel will treat Black Collared Catfish as food.
- Clown Knifefish ⛔ AvoidHard care · Aggressive · 90 cm · 24–28 °C (75–82 °F)Black Collared Catfish and Clown Knifefish are both territorial and at least one is outright aggressive — expect serious fighting.
- Koi ⛔ AvoidMedium care · Peaceful · 90 cm · 4–28 °C (39–82 °F)Black Collared Catfish is bite-sized to a 90 cm koi — it will be eaten.
- Spotted Gar ⛔ AvoidHard care · Aggressive · 90 cm · 18–26 °C (64–79 °F)Two assertive fish, one genuinely aggressive: Black Collared Catfish and Spotted Gar will hold territory and clash.
- Wolf Cichlid ⛔ AvoidHard care · Aggressive · 72 cm · 24–30 °C (75–86 °F)Black Collared Catfish and Wolf Cichlid are both territorial and at least one is outright aggressive — expect serious fighting.
+ 209 more to avoid — the checker above flags every one.
Check any fish against a black collared catfish
Dial in your exact tank size and filter by result — the checker scores every species in our database against a black collared catfish, with the reasoning for each verdict.
Tank-mate checker
Will it live with a Black Collared Catfish?
We compare each fish against your black collared catfish on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- Bristlenose Pleco✅ CompatiblePeaceful · 12 cm · Easy care · 23–30 °C (73–86 °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.
- Elephant-nose Knifefish✅ CompatiblePeaceful · 35 cm · Hard 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.
- Marbled Hoplo✅ CompatiblePeaceful · 14 cm · Easy care · 22–28 °C (72–82 °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.
- Rubber Lip Pleco✅ CompatiblePeaceful · 12 cm · Easy 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.
- Snowball Pleco✅ CompatiblePeaceful · 16 cm · Medium care · 24–30 °C (75–86 °F)
- Compatible on the things that matter: shared water near 24–25 °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.
- Spotted Rubbernose Pleco✅ CompatiblePeaceful · 12 cm · Medium care · 20–26 °C (68–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–25 °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.
- Spotted Talking Catfish✅ CompatiblePeaceful · 15 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.
- Weather Loach✅ CompatiblePeaceful · 25 cm · Easy care · 5–24 °C (41–75 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–24 °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.
- Altifrons Geophagus⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 24–28 °C (75–82 °F)
- Black Collared Catfish and Altifrons Geophagus can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 243 L tank is below the ~378 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Angelicus Synodontis⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 23–27 °C (73–81 °F)
- Black Collared Catfish and Angelicus Synodontis can both be territorial; doable with space and dense planting, but watch for chasing.
- Clown Loach⚠️ With cautionPeaceful · 30 cm · Medium care · 25–30 °C (77–86 °F)
- Your 243 L tank is below the ~400 L this pairing really wants — crowding raises aggression.
- Galaxy Pleco⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 22–26 °C (72–79 °F)
- Black Collared Catfish and Galaxy Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
- Gold Nugget Pleco⚠️ With cautionSemi-aggressive · 28 cm · Hard care · 24–29 °C (75–84 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 243 L tank is below the ~250 L this pairing really wants — crowding raises aggression.
- Honeycomb Pleco⚠️ With cautionSemi-aggressive · 21 cm · Medium care · 24–29 °C (75–84 °F)
- Black Collared Catfish and Honeycomb Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 243 L tank is below the ~280 L this pairing really wants — crowding raises aggression.
- Kissing Gourami⚠️ With cautionSemi-aggressive · 30 cm · Medium care · 22–28 °C (72–82 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 243 L tank is below the ~280 L this pairing really wants — crowding raises aggression.
- Leopard Cactus Pleco⚠️ With cautionSemi-aggressive · 30 cm · Hard care · 24–30 °C (75–86 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 243 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Mango Pleco⚠️ With cautionSemi-aggressive · 28 cm · Hard care · 25–32 °C (77–90 °F)
- Black Collared Catfish and Mango Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 243 L tank is below the ~265 L this pairing really wants — crowding raises aggression.
- Peacock Eel⚠️ With cautionSemi-aggressive · 30 cm · Medium care · 22–28 °C (72–82 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Pearl Cichlid⚠️ With cautionSemi-aggressive · 28 cm · Medium care · 22–28 °C (72–82 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Severum⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 23–30 °C (73–86 °F)
- Black Collared Catfish and Severum can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 243 L tank is below the ~280 L this pairing really wants — crowding raises aggression.
- Silver Cichlid⚠️ With cautionSemi-aggressive · 30 cm · Medium care · 24–28 °C (75–82 °F)
- Black Collared Catfish and Silver Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 243 L tank is below the ~280 L this pairing really wants — crowding raises aggression.
- Spotted Pleco⚠️ With cautionSemi-aggressive · 30 cm · Easy care · 18–26 °C (64–79 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Sunshine Pleco⚠️ With cautionSemi-aggressive · 30 cm · Hard care · 23–29 °C (73–84 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 243 L tank is below the ~473 L this pairing really wants — crowding raises aggression.
- True Parrot Cichlid⚠️ With cautionSemi-aggressive · 33 cm · Hard care · 23–28 °C (73–82 °F)
- Black Collared Catfish and True Parrot Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 243 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Alligator Gar⛔ Not recommendedAggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
- Two assertive fish, one genuinely aggressive: Black Collared Catfish and Alligator Gar will hold territory and clash.
- Black Collared Catfish is bite-sized to a 250 cm predatory alligator gar — it will be eaten.
- Your 243 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)
- Black Collared Catfish and Clown Knifefish are both territorial and at least one is outright aggressive — expect serious fighting.
- Size gap is too large (90 vs 27 cm): Clown Knifefish will treat Black Collared Catfish as food.
- Your 243 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)
- Size gap is too large (100 vs 27 cm): Fire Eel will treat Black Collared Catfish as food.
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 243 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)
- Black Collared Catfish is bite-sized to a 90 cm koi — it will be eaten.
- Your 243 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)
- Two assertive fish, one genuinely aggressive: Black Collared Catfish and Redtail Catfish will hold territory and clash.
- Redtail Catfish (120 cm) is big enough to swallow the 27 cm Black Collared Catfish whole.
- Your 243 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)
- Two assertive fish, one genuinely aggressive: Black Collared Catfish and Spotted Gar will hold territory and clash.
- Spotted Gar (90 cm) is big enough to swallow the 27 cm Black Collared Catfish whole.
- Your 243 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)
- Two assertive fish, one genuinely aggressive: Black Collared Catfish and Wels Catfish will hold territory and clash.
- Black Collared Catfish is bite-sized to a 300 cm predatory wels catfish — it will be eaten.
- Your 243 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)
- Black Collared Catfish and Wolf Cichlid are both territorial and at least one is outright aggressive — expect serious fighting.
- Size gap is too large (72 vs 27 cm): Wolf Cichlid will treat Black Collared Catfish as food.
- Your 243 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.
Setting up a black collared catfish community tank
Give the group a stable, planted 243 L+ tank with a gentle filter, a reliable heater and plenty of cover — broken sight lines and hiding spots let mid-water and bottom dwellers keep out of each other's way. Cycle it fully and stock gradually.
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How to choose the right tank mates for a black collared catfish
Being semi-aggressive, black collared catfish can nip or harass smaller, slower or long-finned fish — give it space, broken sight-lines and similarly robust companions. It mostly occupies the bottom of the tank, so it pairs naturally with species that use the other levels.
Black Collared Catfish grows to about 27 cm, so avoid tank mates small enough to be seen as food — as a rule of thumb, skip anything under roughly 14 cm. Match its water, too: aim for 23–25 °C (73–77 °F), pH 5.5–7.5 and 2–12 dGH. Fish needing very different conditions — coldwater species, or hard-water lovers against a soft-water fish — rarely thrive side by side.
Black Collared Catfish doesn't need its own kind to feel secure; think twice before keeping more than one if it is territorial. Whatever you add, introduce new fish slowly, watch for bullying in the first days, and have a backup plan if temperaments clash.
Frequently asked questions
Can a black collared catfish live with other fish?
Yes — with the right companions. Our checker finds 8 compatible freshwater species for black collared catfish. Pick calm, similarly-sized fish that share its water needs and add them to a mature, well-planted tank.
What is the best tank mate for a black collared catfish?
Easy, peaceful, similarly-sized species top the list — for example Bristlenose Pleco, Rubber Lip Pleco, Marbled Hoplo. Use the checker above to match against your own tank size.
What fish should you avoid keeping with a black collared catfish?
Avoid Wels Catfish, Alligator Gar, Redtail Catfish and similar — usually a temperature, size or temperament clash. The full "avoid" list below gives the reason for each.
How big a tank do black collared catfish tank mates need?
Start from Black Collared Catfish's own minimum and scale up with every addition. The checker above defaults to a 243 L community tank and flags pairings that need more room — drag the slider to match your setup.