Denison Barb Tank Mates

• Arrowhead Puffer✅ Compatible
  Aggressive · 12 cm · Hard care · 23–28 °C (73–82 °F)
  • Peaceful + Aggressive, but with no direct clash here, and their water overlaps around 23–25 °C — no size, zone or temperament conflicts.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Banded Gourami✅ Compatible
  Semi-aggressive · 12 cm · Easy care · 22–28 °C (72–82 °F)
  • Compatible on the things that matter: shared water near 22–25 °C, workable temperaments, and no predator-and-prey size gap.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Denison Barb 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)
  • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Blue Gourami✅ Compatible
  Semi-aggressive · 13 cm · Easy care · 22–28 °C (72–82 °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 Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Boesemani Rainbowfish✅ Compatible
  Peaceful · 11 cm · Medium care · 24–28 °C (75–82 °F)
  • Both are peaceful, and their water overlaps around 24–25 °C — no size, zone or temperament conflicts.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Denison Barb 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.
• Bristlenose Pleco✅ Compatible
  Peaceful · 12 cm · Easy care · 23–30 °C (73–86 °F)
  • Both are peaceful, and their water overlaps around 23–25 °C — no size, zone or temperament conflicts.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Calvus Cichlid✅ Compatible
  Semi-aggressive · 14 cm · Medium care · 24–27 °C (75–81 °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 Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Cupid Cichlid✅ Compatible
  Semi-aggressive · 12 cm · Medium care · 24–29 °C (75–84 °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.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Giant Betta✅ Compatible
  Peaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
  • Both are peaceful, and their water overlaps around 24–25 °C — no size, zone or temperament conflicts.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Giant Glass Catfish✅ Compatible
  Peaceful · 15 cm · Medium care · 22–27 °C (72–81 °F)
  • Compatible on the things that matter: shared water near 22–25 °C, workable temperaments, and no predator-and-prey size gap.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Denison Barb 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)
  • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Marbled Hoplo✅ Compatible
  Peaceful · 14 cm · Easy care · 22–28 °C (72–82 °F)
  • Both are peaceful, and their water overlaps around 22–25 °C — no size, zone or temperament conflicts.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Mascara Barb✅ Compatible
  Peaceful · 12 cm · Medium care · 20–25 °C (68–77 °F)
  • Compatible on the things that matter: shared water near 20–25 °C, workable temperaments, and no predator-and-prey size gap.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
  • Keep Mascara Barb in a shoal of 8+ or it gets stressed and nippy.
• Moonlight Gourami✅ Compatible
  Peaceful · 15 cm · Easy care · 25–30 °C (77–86 °F)
  • Both are peaceful, and their water overlaps around 25–25 °C — no size, zone or temperament conflicts.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Pearl Gourami✅ Compatible
  Peaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
  • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Polka-dot Loach✅ Compatible
  Semi-aggressive · 13 cm · Medium care · 24–28 °C (75–82 °F)
  • Compatible on the things that matter: shared water near 24–25 °C, workable temperaments, and no predator-and-prey size gap.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Rainbow Cichlid✅ Compatible
  Semi-aggressive · 14 cm · Easy care · 22–28 °C (72–82 °F)
  • Compatible on the things that matter: shared water near 22–25 °C, workable temperaments, and no predator-and-prey size gap.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Rubber Lip Pleco✅ Compatible
  Peaceful · 12 cm · Easy care · 20–26 °C (68–79 °F)
  • Compatible on the things that matter: shared water near 20–25 °C, workable temperaments, and no predator-and-prey size gap.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Snowball Pleco✅ Compatible
  Peaceful · 16 cm · Medium care · 24–30 °C (75–86 °F)
  • Both are peaceful, and their water overlaps around 24–25 °C — no size, zone or temperament conflicts.
  • Keep Denison Barb 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)
  • Compatible on the things that matter: shared water near 20–25 °C, workable temperaments, and no predator-and-prey size gap.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Spotted Talking Catfish✅ Compatible
  Peaceful · 15 cm · Easy care · 22–26 °C (72–79 °F)
  • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Keep Denison Barb 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)
  • Both are peaceful, and their water overlaps around 24–25 °C — no size, zone or temperament conflicts.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Swordtail✅ Compatible
  Semi-aggressive · 14 cm · Easy care · 22–28 °C (72–82 °F)
  • Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 22–25 °C — no size, zone or temperament conflicts.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• T-bar Cichlid✅ Compatible
  Semi-aggressive · 12 cm · Medium care · 22–28 °C (72–82 °F)
  • Compatible on the things that matter: shared water near 22–25 °C, workable temperaments, and no predator-and-prey size gap.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Angelfish⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 24–30 °C (75–86 °F)
  • Angelfish and Denison Barb are close in size, but the semi-aggressive one tends to dominate — add denison barb in a group to spread the pressure.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Blue Flash Cichlid⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 24–28 °C (75–82 °F)
  • Blue Flash Cichlid is semi-aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
  • Your 200 L tank is below the ~210 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Bumblebee Cichlid⚠️ With caution
  Aggressive · 15 cm · Medium care · 24–28 °C (75–82 °F)
  • Bumblebee Cichlid is aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Clown Barb⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 24–30 °C (75–86 °F)
  • Expect Clown Barb to harass Denison Barb at times; give dense cover and watch them at feeding.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
  • Keep Clown Barb in a shoal of 6+ or it gets stressed and nippy.
• Dolphin Cichlid⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 23–28 °C (73–82 °F)
  • Dolphin Cichlid and Denison Barb are close in size, but the semi-aggressive one tends to dominate — add denison barb in a group to spread the pressure.
  • Your 200 L tank is below the ~208 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Electric Blue Acara⚠️ With caution
  Semi-aggressive · 16 cm · Medium care · 22–28 °C (72–82 °F)
  • Expect Electric Blue Acara to harass Denison Barb at times; give dense cover and watch them at feeding.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Emperor Peacock Cichlid⚠️ With caution
  Semi-aggressive · 16 cm · Medium care · 24–28 °C (75–82 °F)
  • Emperor Peacock Cichlid and Denison Barb are close in size, but the semi-aggressive one tends to dominate — add denison barb in a group to spread the pressure.
  • Your 200 L tank is below the ~210 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Eureka Red Peacock Cichlid⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 24–28 °C (75–82 °F)
  • Eureka Red Peacock Cichlid and Denison Barb are close in size, but the semi-aggressive one tends to dominate — add denison barb in a group to spread the pressure.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Fire Blue Empress Cichlid⚠️ With caution
  Semi-aggressive · 18 cm · Medium care · 24–28 °C (75–82 °F)
  • Expect Fire Blue Empress Cichlid to harass Denison Barb at times; give dense cover and watch them at feeding.
  • Your 200 L tank is below the ~400 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Firemouth Cichlid⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 22–29 °C (72–84 °F)
  • Firemouth Cichlid is semi-aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Gold Zebra Loach⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 25–29 °C (77–84 °F)
  • Gold Zebra Loach is semi-aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Guyana Flag Cichlid⚠️ With caution
  Semi-aggressive · 18 cm · Medium care · 24–30 °C (75–86 °F)
  • Expect Guyana Flag Cichlid to harass Denison Barb at times; give dense cover and watch them at feeding.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Jewel Cichlid⚠️ With caution
  Aggressive · 15 cm · Medium care · 22–26 °C (72–79 °F)
  • Jewel Cichlid is aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Panama Convict Cichlid⚠️ With caution
  Aggressive · 15 cm · Medium care · 24–30 °C (75–86 °F)
  • Panama Convict Cichlid and Denison Barb are close in size, but the aggressive one tends to dominate — add denison barb in a group to spread the pressure.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Red Zebra Cichlid⚠️ With caution
  Aggressive · 13 cm · Medium care · 23–28 °C (73–82 °F)
  • Denison Barb is slow and long-finned; a busy red zebra cichlid shoal tends to nip at it. Keep red zebra cichlid in a proper group of 6+ and watch them closely.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
  • Keep Red Zebra Cichlid in a shoal of 6+ or it gets stressed and nippy.
• Yoyo Loach⚠️ With caution
  Semi-aggressive · 15 cm · Medium care · 24–30 °C (75–86 °F)
  • Yoyo Loach is semi-aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Alligator Gar⛔ Not recommended
  Aggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
  • Size gap is too large (250 vs 15 cm): Alligator Gar will treat Denison Barb as food.
  • Alligator Gar is aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
  • Your 200 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Clown Knifefish⛔ Not recommended
  Aggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
  • Size gap is too large (90 vs 15 cm): Clown Knifefish will treat Denison Barb as food.
  • Clown Knifefish clearly outsizes Denison Barb and is aggressive; risky unless the tank is big and well-planted.
  • Your 200 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Fire Eel⛔ Not recommended
  Semi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
  • Size gap is too large (100 vs 15 cm): Fire Eel will treat Denison Barb as food.
  • Fire Eel is semi-aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
  • Your 200 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Koi⛔ Not recommended
  Peaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
  • Koi (90 cm) is big enough to swallow the 15 cm Denison Barb whole.
  • Your 200 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Redtail Catfish⛔ Not recommended
  Aggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
  • Redtail Catfish (120 cm) is big enough to swallow the 15 cm Denison Barb whole.
  • Redtail Catfish clearly outsizes Denison Barb and is aggressive; risky unless the tank is big and well-planted.
  • Your 200 L tank is below the ~5700 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Spotted Gar⛔ Not recommended
  Aggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
  • Spotted Gar (90 cm) is big enough to swallow the 15 cm Denison Barb whole.
  • Spotted Gar clearly outsizes Denison Barb and is aggressive; risky unless the tank is big and well-planted.
  • Your 200 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Wels Catfish⛔ Not recommended
  Aggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
  • Size gap is too large (300 vs 15 cm): Wels Catfish will treat Denison Barb as food.
  • Wels Catfish is aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
  • Your 200 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb in a shoal of 6+ or it gets stressed and nippy.
• Wolf Cichlid⛔ Not recommended
  Aggressive · 72 cm · Hard care · 24–30 °C (75–86 °F)
  • Size gap is too large (72 vs 15 cm): Wolf Cichlid will treat Denison Barb as food.
  • Wolf Cichlid is aggressive and may chase or nip the smaller Denison Barb — plant heavily and break up sight lines.
  • Your 200 L tank is below the ~760 L this pairing really wants — crowding raises aggression.
  • Keep Denison Barb 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.