Convict Cichlid Tank Mates

Convict Cichlid is aggressive, so its tank mates need choosing with care. Here are the 44 freshwater species that pair well with a convict cichlid — plus the 184 to avoid — with a live checker you can tune to your own tank.

By The Aquarium DB Team • Updated June 7, 2026 • Full Convict Cichlid care guide →
Best matches

The best tank mates for a convict cichlid

  • Axelrod's Cory ✅ Compatible
    Easy care · Peaceful · 5 cm · 23–28 °C (73–82 °F)
    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.
  • Bandit Corydoras ✅ Compatible
    Easy care · Peaceful · 5 cm · 22–27 °C (72–81 °F)
    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.
  • Japanese Trapdoor Snail ✅ Compatible
    Easy care · Peaceful · 5 cm · 10–28 °C (50–82 °F)
    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.
  • Julii Corydoras ✅ Compatible
    Easy care · Peaceful · 5 cm · 23–26 °C (73–79 °F)
    Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Masked Corydoras ✅ Compatible
    Easy care · Peaceful · 5 cm · 22–28 °C (72–82 °F)
    Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Skunk Corydoras ✅ Compatible
    Easy care · Peaceful · 5 cm · 22–26 °C (72–79 °F)
    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.
  • Rust Corydoras ✅ Compatible
    Easy care · Peaceful · 5.5 cm · 23–27 °C (73–81 °F)
    Compatible on the things that matter: shared water near 23–27 °C, workable temperaments, and no predator-and-prey size gap.
  • Agassiz's Corydoras ✅ Compatible
    Easy care · Peaceful · 6 cm · 22–28 °C (72–82 °F)
    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.
  • Elegant Cory ✅ Compatible
    Easy care · Peaceful · 6 cm · 22–28 °C (72–82 °F)
    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.
  • False Julii Corydoras ✅ Compatible
    Easy care · Peaceful · 6 cm · 22–26 °C (72–79 °F)
    Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
  • Corydoras Catfish ✅ Compatible
    Easy care · Peaceful · 6.5 cm · 22–26 °C (72–79 °F)
    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.
  • Spotfin Corydoras ✅ Compatible
    Easy care · Peaceful · 6.5 cm · 22–26 °C (72–79 °F)
    Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
  • Peppered Corydoras ✅ Compatible
    Easy care · Peaceful · 7 cm · 18–26 °C (64–79 °F)
    Compatible on the things that matter: shared water near 21–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Spotted Corydoras ✅ Compatible
    Easy care · Peaceful · 7 cm · 22–27 °C (72–81 °F)
    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 Kuhli Loach ✅ Compatible
    Easy care · Peaceful · 8 cm · 23–28 °C (73–82 °F)
    Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–28 °C — no size, zone or temperament conflicts.
  • Burmese Loach ✅ Compatible
    Easy care · Peaceful · 9 cm · 22–28 °C (72–82 °F)
    Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Porthole Catfish ✅ Compatible
    Easy care · Peaceful · 10 cm · 22–28 °C (72–82 °F)
    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.
  • Murray River Rainbowfish ✅ Compatible
    Easy care · Peaceful · 11 cm · 15–26 °C (59–79 °F)
    Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 21–26 °C — no size, zone or temperament conflicts.
  • Bristlenose Pleco ✅ Compatible
    Easy care · Peaceful · 12 cm · 23–30 °C (73–86 °F)
    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 ✅ Compatible
    Easy care · Peaceful · 12 cm · 24–30 °C (75–86 °F)
    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 ✅ Compatible
    Easy care · Peaceful · 14 cm · 22–28 °C (72–82 °F)
    Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
  • Spotted Talking Catfish ✅ Compatible
    Easy care · Peaceful · 15 cm · 22–26 °C (72–79 °F)
    Compatible on the things that matter: shared water near 22–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Blue Turbo Snail ✅ Compatible
    Medium care · Peaceful · 5 cm · 25–30 °C (77–86 °F)
    Compatible on the things that matter: shared water near 25–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Horseman Cory ✅ Compatible
    Medium care · Peaceful · 5 cm · 22–26 °C (72–79 °F)
    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.
With caution

Convict Cichlid tank mates that can work with care

  • Adolf's Cory ⚠️ With caution
    Medium care · Peaceful · 5.5 cm · 22–26 °C (72–79 °F)
    Water hardness preferences differ (Convict Cichlid 9–20 vs Adolf's Cory 1–8 dGH).
  • African Dwarf Frog ⚠️ With caution
    Medium care · Peaceful · 4 cm · 22–26 °C (72–79 °F)
    Convict Cichlid may hunt African Dwarf Frog, fry or shrimplets — safest in a heavily planted tank.
  • Amano Shrimp ⚠️ With caution
    Easy care · Peaceful · 5 cm · 18–28 °C (64–82 °F)
    Convict Cichlid may eat Amano Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
  • Amapá Tetra ⚠️ With caution
    Medium care · Peaceful · 4 cm · 24–27 °C (75–81 °F)
    Convict Cichlid is aggressive and may chase or nip the smaller Amapá Tetra — plant heavily and break up sight lines.
  • Amazon Puffer ⚠️ With caution
    Medium care · Peaceful · 8 cm · 23–28 °C (73–82 °F)
    Convict Cichlid and Amazon Puffer are close in size, but the aggressive one tends to dominate — add amazon puffer in a group to spread the pressure.
  • Assassin Snail ⚠️ With caution
    Easy care · Peaceful · 3 cm · 22–26 °C (72–79 °F)
    Convict Cichlid may bully the smaller Assassin Snail, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Bamboo Shrimp ⚠️ With caution
    Medium care · Peaceful · 8 cm · 22–27 °C (72–81 °F)
    Convict Cichlid and Bamboo Shrimp are close in size, but the aggressive one tends to dominate — add bamboo shrimp in a group to spread the pressure.
  • Black Phantom Tetra ⚠️ With caution
    Easy care · Peaceful · 4.5 cm · 22–28 °C (72–82 °F)
    Convict Cichlid is aggressive and may chase or nip the smaller Black Phantom Tetra — plant heavily and break up sight lines.

+ 104 more “with caution” pairings — see the interactive checker above.

Avoid

Fish to avoid keeping with a convict cichlid

  • Mekong Giant Catfish ⛔ Avoid
    Hard care · Semi-aggressive · 300 cm · 20–28 °C (68–82 °F)
    Two assertive fish, one genuinely aggressive: Convict Cichlid and Mekong Giant Catfish will hold territory and clash.
  • Wels Catfish ⛔ Avoid
    Hard care · Aggressive · 300 cm · 15–25 °C (59–77 °F)
    Two assertive fish, one genuinely aggressive: Convict Cichlid and Wels Catfish will hold territory and clash.
  • Alligator Gar ⛔ Avoid
    Hard care · Aggressive · 250 cm · 24–28 °C (75–82 °F)
    Two assertive fish, one genuinely aggressive: Convict Cichlid and Alligator Gar will hold territory and clash.
  • Redtail Catfish ⛔ Avoid
    Hard care · Aggressive · 120 cm · 24–27 °C (75–81 °F)
    Two assertive fish, one genuinely aggressive: Convict Cichlid and Redtail Catfish will hold territory and clash.
  • Fire Eel ⛔ Avoid
    Medium care · Semi-aggressive · 100 cm · 24–28 °C (75–82 °F)
    Convict Cichlid and Fire Eel are both territorial and at least one is outright aggressive — expect serious fighting.
  • Clown Knifefish ⛔ Avoid
    Hard care · Aggressive · 90 cm · 24–28 °C (75–82 °F)
    Convict Cichlid and Clown Knifefish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Koi ⛔ Avoid
    Medium care · Peaceful · 90 cm · 4–28 °C (39–82 °F)
    Convict Cichlid is bite-sized to a 90 cm koi — it will be eaten.
  • Spotted Gar ⛔ Avoid
    Hard care · Aggressive · 90 cm · 18–26 °C (64–79 °F)
    Two assertive fish, one genuinely aggressive: Convict Cichlid and Spotted Gar will hold territory and clash.

+ 176 more to avoid — the checker above flags every one.

Interactive tool

Check any fish against a convict cichlid

Dial in your exact tank size and filter by result — the checker scores every species in our database against a convict cichlid, with the reasoning for each verdict.

Tank-mate checker

Will it live with a Convict Cichlid?

We compare each fish against your convict cichlid on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.

  • Agassiz's Corydoras✅ Compatible
    Peaceful · 6 cm · Easy care · 22–28 °C (72–82 °F)
    • 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 Agassiz's Corydoras in a shoal of 6+ or it gets stressed and nippy.
  • Banjo Catfish✅ Compatible
    Peaceful · 15 cm · Medium care · 20–26 °C (68–79 °F)
    • Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 21–26 °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.
  • Bearded Corydoras✅ Compatible
    Peaceful · 10 cm · Medium care · 18–24 °C (64–75 °F)
    • Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 21–24 °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.
  • Black Kuhli Loach✅ Compatible
    Peaceful · 8 cm · Easy care · 23–28 °C (73–82 °F)
    • Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–28 °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✅ Compatible
    Peaceful · 6 cm · Medium care · 24–29 °C (75–84 °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.
  • Bolivian Ram✅ Compatible
    Peaceful · 8 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.
    • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
  • Bristlenose Pleco✅ Compatible
    Peaceful · 12 cm · Easy care · 23–30 °C (73–86 °F)
    • 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✅ Compatible
    Peaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
    • Compatible on the things that matter: shared water near 22–28 °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.
  • Clown Pleco✅ Compatible
    Peaceful · 9 cm · Medium care · 24–28 °C (75–82 °F)
    • 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.
  • Corydoras Catfish✅ Compatible
    Peaceful · 6.5 cm · Easy care · 22–26 °C (72–79 °F)
    • 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.
  • Giant Kuhli Loach✅ Compatible
    Peaceful · 12 cm · Easy care · 24–30 °C (75–86 °F)
    • 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✅ Compatible
    Peaceful · 9 cm · Medium care · 25–30 °C (77–86 °F)
    • Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 25–28 °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.
  • Marbled Hoplo✅ Compatible
    Peaceful · 14 cm · Easy care · 22–28 °C (72–82 °F)
    • Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–28 °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.
  • Murray River Rainbowfish✅ Compatible
    Peaceful · 11 cm · Easy care · 15–26 °C (59–79 °F)
    • Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 21–26 °C — no size, zone or temperament conflicts.
    • Keep Murray River Rainbowfish in a shoal of 6+ or it gets stressed and nippy.
  • Pantanal Corydoras✅ Compatible
    Peaceful · 8 cm · Medium care · 22–27 °C (72–81 °F)
    • Compatible on the things that matter: shared water near 22–27 °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 Pantanal Corydoras in a shoal of 6+ or it gets stressed and nippy.
  • Peppered Corydoras✅ Compatible
    Peaceful · 7 cm · Easy care · 18–26 °C (64–79 °F)
    • Compatible on the things that matter: shared water near 21–26 °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.
  • Porthole Catfish✅ Compatible
    Peaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
    • 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.
  • Spotfin Corydoras✅ Compatible
    Peaceful · 6.5 cm · Easy care · 22–26 °C (72–79 °F)
    • Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–26 °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✅ Compatible
    Peaceful · 7 cm · Easy care · 22–27 °C (72–81 °F)
    • 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 Spotted Corydoras in a shoal of 6+ or it gets stressed and nippy.
  • Spotted Rubbernose Pleco✅ Compatible
    Peaceful · 12 cm · Medium care · 20–26 °C (68–79 °F)
    • 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.
  • Spotted Talking Catfish✅ Compatible
    Peaceful · 15 cm · Easy care · 22–26 °C (72–79 °F)
    • Compatible on the things that matter: shared water near 22–26 °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✅ Compatible
    Peaceful · 6.5 cm · Medium care · 24–30 °C (75–86 °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 Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
  • Striped Eel Loach✅ Compatible
    Peaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
    • 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.
  • Zebra Pleco✅ Compatible
    Peaceful · 10 cm · Hard care · 26–30 °C (79–86 °F)
    • Aggressive + Peaceful, but with no direct clash here, and their water overlaps around 26–28 °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.
  • Boesemani Rainbowfish⚠️ With caution
    Peaceful · 11 cm · Medium care · 24–28 °C (75–82 °F)
    • Your 110 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
    • Keep Boesemani Rainbowfish in a shoal of 6+ or it gets stressed and nippy.
  • Brilliant Rasbora⚠️ With caution
    Peaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
    • Convict Cichlid and Brilliant Rasbora are close in size, but the aggressive one tends to dominate — add brilliant rasbora in a group to spread the pressure.
    • Keep Brilliant Rasbora in a shoal of 6+ or it gets stressed and nippy.
  • Clown Rasbora⚠️ With caution
    Peaceful · 10 cm · Medium care · 23–28 °C (73–82 °F)
    • Convict Cichlid and Clown Rasbora are close in size, but the aggressive one tends to dominate — add clown rasbora in a group to spread the pressure.
    • Keep Clown Rasbora in a shoal of 6+ or it gets stressed and nippy.
  • Giant Betta⚠️ With caution
    Peaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
    • One likes softer water and the other harder (9–20 vs 1–8 dGH) — a compromise, not a perfect match.
  • Giant Danio⚠️ With caution
    Peaceful · 10 cm · Easy care · 20–27 °C (68–81 °F)
    • Convict Cichlid and Giant Danio are close in size, but the aggressive one tends to dominate — add giant danio in a group to spread the pressure.
    • Keep Giant Danio in a shoal of 6+ or it gets stressed and nippy.
  • Keyhole Cichlid⚠️ With caution
    Peaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
    • Convict Cichlid and Keyhole Cichlid are close in size, but the aggressive one tends to dominate — add keyhole cichlid in a group to spread the pressure.
  • Kuhli Loach⚠️ With caution
    Peaceful · 10 cm · Easy care · 24–30 °C (75–86 °F)
    • Water hardness preferences differ (Convict Cichlid 9–20 vs Kuhli Loach 1–8 dGH).
  • Mascara Barb⚠️ With caution
    Peaceful · 12 cm · Medium care · 20–25 °C (68–77 °F)
    • Your 110 L tank is below the ~200 L this pairing really wants — crowding raises aggression.
    • Keep Mascara Barb in a shoal of 8+ or it gets stressed and nippy.
  • Medusa Pleco⚠️ With caution
    Peaceful · 12 cm · Medium care · 26–30 °C (79–86 °F)
    • Your 110 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
  • Molly⚠️ With caution
    Peaceful · 10 cm · Easy care · 23–28 °C (73–82 °F)
    • Expect Convict Cichlid to harass Molly at times; give dense cover and watch them at feeding.
  • Pearl Gourami⚠️ With caution
    Peaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
    • Your 110 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
  • Rubber Lip Pleco⚠️ With caution
    Peaceful · 12 cm · Easy care · 20–26 °C (68–79 °F)
    • Your 110 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
  • Silver Tetra⚠️ With caution
    Peaceful · 9 cm · Easy care · 24–28 °C (75–82 °F)
    • Convict Cichlid and Silver Tetra are close in size, but the aggressive one tends to dominate — add silver tetra in a group to spread the pressure.
    • Your 110 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 caution
    Peaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
    • Expect Convict Cichlid to harass Thick-lipped Gourami at times; give dense cover and watch them at feeding.
  • Upside-down Catfish⚠️ With caution
    Peaceful · 10 cm · Easy care · 22–26 °C (72–79 °F)
    • Your 110 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
  • Zebra Loach⚠️ With caution
    Peaceful · 9 cm · Medium care · 23–26 °C (73–79 °F)
    • Your 110 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
  • Alligator Gar⛔ Not recommended
    Aggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
    • Two assertive fish, one genuinely aggressive: Convict Cichlid and Alligator Gar will hold territory and clash.
    • Convict Cichlid is bite-sized to a 250 cm predatory alligator gar — it will be eaten.
    • Your 110 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
  • Clown Knifefish⛔ Not recommended
    Aggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
    • Convict Cichlid and Clown Knifefish are both territorial and at least one is outright aggressive — expect serious fighting.
    • Size gap is too large (90 vs 10 cm): Clown Knifefish will treat Convict Cichlid as food.
    • Your 110 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
  • Fire Eel⛔ Not recommended
    Semi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
    • Convict Cichlid and Fire Eel are both territorial and at least one is outright aggressive — expect serious fighting.
    • Size gap is too large (100 vs 10 cm): Fire Eel will treat Convict Cichlid as food.
    • Your 110 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
  • Koi⛔ Not recommended
    Peaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
    • Convict Cichlid is bite-sized to a 90 cm koi — it will be eaten.
    • Your 110 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
  • Mekong Giant Catfish⛔ Not recommended
    Semi-aggressive · 300 cm · Hard care · 20–28 °C (68–82 °F)
    • Two assertive fish, one genuinely aggressive: Convict Cichlid and Mekong Giant Catfish will hold territory and clash.
    • Your 110 L tank is below the ~100000 L this pairing really wants — crowding raises aggression.
  • Redtail Catfish⛔ Not recommended
    Aggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
    • Two assertive fish, one genuinely aggressive: Convict Cichlid and Redtail Catfish will hold territory and clash.
    • Convict Cichlid is bite-sized to a 120 cm predatory redtail catfish — it will be eaten.
    • Your 110 L tank is below the ~5700 L this pairing really wants — crowding raises aggression.
  • Spotted Gar⛔ Not recommended
    Aggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
    • Two assertive fish, one genuinely aggressive: Convict Cichlid and Spotted Gar will hold territory and clash.
    • Size gap is too large (90 vs 10 cm): Spotted Gar will treat Convict Cichlid as food.
    • Your 110 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
  • Wels Catfish⛔ Not recommended
    Aggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
    • Two assertive fish, one genuinely aggressive: Convict Cichlid and Wels Catfish will hold territory and clash.
    • Wels Catfish (300 cm) is big enough to swallow the 10 cm Convict Cichlid whole.
    • Your 110 L tank is below the ~20000 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 convict cichlid community tank

Give the group a stable, planted 110 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

How to choose the right tank mates for a convict cichlid

Convict Cichlid is aggressive and territorial, so most community fish are unsafe; any tank mate must be large, tough and able to hold its own. It mostly occupies the bottom of the tank, so it pairs naturally with species that use the other levels.

Convict Cichlid grows to about 10 cm, so avoid tank mates small enough to be seen as food — as a rule of thumb, skip anything under roughly 5 cm. Match its water, too: aim for 21–28 °C (70–82 °F), pH 6.5–8 and 9–20 dGH. Fish needing very different conditions — coldwater species, or hard-water lovers against a soft-water fish — rarely thrive side by side.

Convict Cichlid 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.

FAQ

Frequently asked questions

Can a convict cichlid live with other fish?

Yes — with the right companions. Our checker finds 44 compatible freshwater species for convict cichlid. 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 convict cichlid?

Easy, peaceful, similarly-sized species top the list — for example Axelrod's Cory, Bandit Corydoras, Japanese Trapdoor Snail. Use the checker above to match against your own tank size.

What fish should you avoid keeping with a convict cichlid?

Avoid Mekong Giant Catfish, Wels Catfish, Alligator Gar and similar — usually a temperature, size or temperament clash. The full "avoid" list below gives the reason for each.

How big a tank do convict cichlid tank mates need?

Start from Convict Cichlid's own minimum and scale up with every addition. The checker above defaults to a 110 L community tank and flags pairings that need more room — drag the slider to match your setup.

← Back to the full Convict Cichlid care guide