Tiger Betta Tank Mates

Tiger Betta is semi-aggressive, so its tank mates need choosing with care. Here are the 31 freshwater species that pair well with a tiger betta — plus the 125 to avoid — with a live checker you can tune to your own tank.

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

The best tank mates for a tiger betta

  • Axelrod's Cory ✅ Compatible
    Easy care · Peaceful · 5 cm · 23–28 °C (73–82 °F)
    Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Bandit Corydoras ✅ Compatible
    Easy care · Peaceful · 5 cm · 22–27 °C (72–81 °F)
    Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–27 °C — no size, zone or temperament conflicts.
  • Japanese Trapdoor Snail ✅ Compatible
    Easy care · Peaceful · 5 cm · 10–28 °C (50–82 °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.
  • 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)
    Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–27 °C — no size, zone or temperament conflicts.
  • Skunk Corydoras ✅ Compatible
    Easy care · Peaceful · 5 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.
  • 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)
    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.
  • Elegant Cory ✅ Compatible
    Easy care · Peaceful · 6 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.
  • False Julii Corydoras ✅ Compatible
    Easy care · Peaceful · 6 cm · 22–26 °C (72–79 °F)
    Semi-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)
    Compatible on the things that matter: shared water near 22–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Spotfin Corydoras ✅ Compatible
    Easy care · Peaceful · 6.5 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.
  • Peppered Corydoras ✅ Compatible
    Easy care · Peaceful · 7 cm · 18–26 °C (64–79 °F)
    Compatible on the things that matter: shared water near 22–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Spotted Corydoras ✅ Compatible
    Easy care · Peaceful · 7 cm · 22–27 °C (72–81 °F)
    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 Kuhli Loach ✅ Compatible
    Easy care · Peaceful · 8 cm · 23–28 °C (73–82 °F)
    Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–27 °C — no size, zone or temperament conflicts.
  • Burmese Loach ✅ Compatible
    Easy care · Peaceful · 9 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.
  • Kuhli Loach ✅ Compatible
    Easy care · Peaceful · 10 cm · 24–30 °C (75–86 °F)
    Compatible on the things that matter: shared water near 24–27 °C, workable temperaments, and no predator-and-prey size gap.
  • Giant Kuhli Loach ✅ Compatible
    Easy care · Peaceful · 12 cm · 24–30 °C (75–86 °F)
    Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Horseman Cory ✅ Compatible
    Medium care · Peaceful · 5 cm · 22–26 °C (72–79 °F)
    Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
  • Panda Corydoras ✅ Compatible
    Medium care · Peaceful · 5 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.
  • Adolf's Cory ✅ Compatible
    Medium care · Peaceful · 5.5 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.
  • Duplicareus Corydoras ✅ Compatible
    Medium 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.
  • Narcissus II Cory ✅ Compatible
    Medium care · Peaceful · 5.5 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.
  • Blood Red Tiger Pleco ✅ Compatible
    Medium care · Peaceful · 6 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.
With caution

Tiger Betta tank mates that can work with care

  • Afra Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 10 cm · 24–28 °C (75–82 °F)
    pH preferences only just meet (Tiger Betta 5–7 vs Afra Cichlid 7.8–8.6) — target the overlap and acclimate slowly.
  • African Butterfly Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 8 cm · 22–28 °C (72–82 °F)
    Tiger Betta and African Butterfly Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
  • Agassiz's Dwarf Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 9 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.
  • Altifrons Geophagus ⚠️ With caution
    Medium care · Semi-aggressive · 25 cm · 24–28 °C (75–82 °F)
    Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
  • Amano Shrimp ⚠️ With caution
    Easy care · Peaceful · 5 cm · 18–28 °C (64–82 °F)
    Adult Amano Shrimp might survive with Tiger Betta, but expect the young to be eaten — plant heavily.
  • Amazon Puffer ⚠️ With caution
    Medium care · Peaceful · 8 cm · 23–28 °C (73–82 °F)
    Tiger Betta is semi-aggressive and may chase or nip the smaller Amazon Puffer — plant heavily and break up sight lines.
  • Angelfish ⚠️ With caution
    Medium care · Semi-aggressive · 15 cm · 24–30 °C (75–86 °F)
    Tiger Betta and Angelfish can both be territorial; doable with space and dense planting, but watch for chasing.
  • Angelicus Synodontis ⚠️ With caution
    Medium care · Semi-aggressive · 25 cm · 23–27 °C (73–81 °F)
    Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.

+ 176 more “with caution” pairings — see the interactive checker above.

Avoid

Fish to avoid keeping with a tiger betta

  • Wels Catfish ⛔ Avoid
    Hard care · Aggressive · 300 cm · 15–25 °C (59–77 °F)
    Tiger Betta and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Alligator Gar ⛔ Avoid
    Hard care · Aggressive · 250 cm · 24–28 °C (75–82 °F)
    Tiger Betta and Alligator Gar are both territorial and at least one is outright aggressive — expect serious fighting.
  • Redtail Catfish ⛔ Avoid
    Hard care · Aggressive · 120 cm · 24–27 °C (75–81 °F)
    Tiger Betta and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Fire Eel ⛔ Avoid
    Medium care · Semi-aggressive · 100 cm · 24–28 °C (75–82 °F)
    Tiger Betta is bite-sized to a 100 cm predatory fire eel — it will be eaten.
  • Clown Knifefish ⛔ Avoid
    Hard care · Aggressive · 90 cm · 24–28 °C (75–82 °F)
    Two assertive fish, one genuinely aggressive: Tiger Betta and Clown Knifefish will hold territory and clash.
  • Koi ⛔ Avoid
    Medium care · Peaceful · 90 cm · 4–28 °C (39–82 °F)
    Size gap is too large (90 vs 11 cm): Koi will treat Tiger Betta as food.
  • Spotted Gar ⛔ Avoid
    Hard care · Aggressive · 90 cm · 18–26 °C (64–79 °F)
    Tiger Betta and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
  • Wolf Cichlid ⛔ Avoid
    Hard care · Aggressive · 72 cm · 24–30 °C (75–86 °F)
    Two assertive fish, one genuinely aggressive: Tiger Betta and Wolf Cichlid will hold territory and clash.

+ 117 more to avoid — the checker above flags every one.

Interactive tool

Check any fish against a tiger betta

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

Tank-mate checker

Will it live with a Tiger Betta?

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

  • Adolf's Cory✅ Compatible
    Peaceful · 5.5 cm · Medium care · 22–26 °C (72–79 °F)
    • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep Adolf's Cory in a shoal of 6+ or it gets stressed and nippy.
  • Agassiz's Corydoras✅ Compatible
    Peaceful · 6 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.
    • Keep Agassiz's Corydoras in a shoal of 6+ or it gets stressed and nippy.
  • Axelrod's Cory✅ Compatible
    Peaceful · 5 cm · Easy care · 23–28 °C (73–82 °F)
    • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep Axelrod's Cory 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)
    • 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 Kuhli Loach✅ Compatible
    Peaceful · 8 cm · Easy care · 23–28 °C (73–82 °F)
    • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–27 °C — no size, zone or temperament conflicts.
  • Blood Red Tiger Pleco✅ Compatible
    Peaceful · 6 cm · Medium care · 24–29 °C (75–84 °F)
    • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Bolivian Ram✅ Compatible
    Peaceful · 8 cm · Medium care · 24–28 °C (75–82 °F)
    • Compatible on the things that matter: shared water near 24–27 °C, workable temperaments, and no predator-and-prey size gap.
  • Burmese Loach✅ Compatible
    Peaceful · 9 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.
  • Corydoras Catfish✅ Compatible
    Peaceful · 6.5 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.
    • Keep Corydoras Catfish in a shoal of 6+ or it gets stressed and nippy.
  • Duplicareus Corydoras✅ Compatible
    Peaceful · 5.5 cm · Medium care · 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.
    • Keep Duplicareus Corydoras in a shoal of 6+ or it gets stressed and nippy.
  • Elegant Cory✅ Compatible
    Peaceful · 6 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.
    • Keep Elegant Cory in a shoal of 6+ or it gets stressed and nippy.
  • False Julii Corydoras✅ Compatible
    Peaceful · 6 cm · Easy care · 22–26 °C (72–79 °F)
    • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
    • Keep False Julii Corydoras 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)
    • 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.
  • Kuhli Loach✅ Compatible
    Peaceful · 10 cm · Easy care · 24–30 °C (75–86 °F)
    • Compatible on the things that matter: shared water near 24–27 °C, workable temperaments, and no predator-and-prey size gap.
  • Leopard Frog Pleco✅ Compatible
    Peaceful · 9 cm · Medium care · 25–30 °C (77–86 °F)
    • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 25–27 °C — no size, zone or temperament conflicts.
  • Narcissus II Cory✅ Compatible
    Peaceful · 5.5 cm · Medium care · 22–26 °C (72–79 °F)
    • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep Narcissus II Cory 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 22–26 °C, workable temperaments, and no predator-and-prey size gap.
    • Keep Peppered Corydoras in a shoal of 6+ or it gets stressed and nippy.
  • Rio Negro Checkerboard Cichlid✅ Compatible
    Peaceful · 7 cm · Hard care · 24–29 °C (75–84 °F)
    • Compatible on the things that matter: shared water near 24–27 °C, workable temperaments, and no predator-and-prey size gap.
  • Rust Corydoras✅ Compatible
    Peaceful · 5.5 cm · Easy care · 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.
    • Keep Rust Corydoras in a shoal of 6+ or it gets stressed and nippy.
  • Slate Corydoras✅ Compatible
    Peaceful · 6 cm · Medium care · 23–28 °C (73–82 °F)
    • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep Slate Corydoras in a shoal of 6+ or it gets stressed and nippy.
  • Spotfin Corydoras✅ Compatible
    Peaceful · 6.5 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.
    • 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)
    • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep 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)
    • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
  • Sterbai Corydoras✅ Compatible
    Peaceful · 6.5 cm · Medium care · 24–30 °C (75–86 °F)
    • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
    • Keep Sterbai Corydoras in a shoal of 6+ or it gets stressed and nippy.
  • Afra Cichlid⚠️ With caution
    Semi-aggressive · 10 cm · Medium care · 24–28 °C (75–82 °F)
    • pH preferences only just meet (Tiger Betta 5–7 vs Afra Cichlid 7.8–8.6) — target the overlap and acclimate slowly.
    • One likes softer water and the other harder (0–8 vs 10–20 dGH) — a compromise, not a perfect match.
    • Tiger Betta and Afra Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
    • Tiger Betta is slow and long-finned; a busy afra cichlid shoal tends to nip at it. Keep afra cichlid in a proper group of 6+ and watch them closely.
    • Your 75 L tank is below the ~150 L this pairing really wants — crowding raises aggression.
    • Keep Afra Cichlid in a shoal of 6+ or it gets stressed and nippy.
  • Banded Gourami⚠️ With caution
    Semi-aggressive · 12 cm · Easy care · 22–28 °C (72–82 °F)
    • Tiger Betta and Banded Gourami can both be territorial; doable with space and dense planting, but watch for chasing.
    • Tiger Betta and Banded Gourami are both labyrinth fish and often treat each other as rivals — give a large, broken-up tank and be ready to separate them.
  • Boesemani Rainbowfish⚠️ With caution
    Peaceful · 11 cm · Medium care · 24–28 °C (75–82 °F)
    • Different pH ranges (5–7 vs 7.5–8.5); doable if you sit in the shared band, but not ideal long-term.
    • Water hardness preferences differ (Tiger Betta 0–8 vs Boesemani Rainbowfish 10–20 dGH).
    • Expect Tiger Betta to harass Boesemani Rainbowfish at times; give dense cover and watch them at feeding.
    • Your 75 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.
  • Bristlenose Pleco⚠️ With caution
    Peaceful · 12 cm · Easy care · 23–30 °C (73–86 °F)
    • Your 75 L tank is below the ~95 L this pairing really wants — crowding raises aggression.
  • Cupid Cichlid⚠️ With caution
    Semi-aggressive · 12 cm · Medium 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 75 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
  • Giant Betta⚠️ With caution
    Peaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
    • Tiger Betta and Giant Betta are both labyrinth fish and often treat each other as rivals — give a large, broken-up tank and be ready to separate them.
  • Golden Vampire Pleco⚠️ With caution
    Semi-aggressive · 11 cm · Medium care · 26–30 °C (79–86 °F)
    • Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
    • Your 75 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
  • Mascara Barb⚠️ With caution
    Peaceful · 12 cm · Medium care · 20–25 °C (68–77 °F)
    • Your 75 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 75 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
  • Murray River Rainbowfish⚠️ With caution
    Peaceful · 11 cm · Easy care · 15–26 °C (59–79 °F)
    • Tiger Betta is semi-aggressive and may chase or nip the smaller Murray River Rainbowfish — plant heavily and break up sight lines.
    • Keep Murray River Rainbowfish in a shoal of 6+ or it gets stressed and nippy.
  • Pearl Gourami⚠️ With caution
    Peaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
    • Tiger Betta and Pearl Gourami are both labyrinth fish and often treat each other as rivals — give a large, broken-up tank and be ready to separate them.
    • Your 75 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
  • Pictus Catfish⚠️ With caution
    Semi-aggressive · 12 cm · Medium care · 22–27 °C (72–81 °F)
    • Tiger Betta and Pictus Catfish can both be territorial; doable with space and dense planting, but watch for chasing.
    • Your 75 L tank is below the ~210 L this pairing really wants — crowding raises aggression.
  • Powder Blue Cichlid⚠️ With caution
    Semi-aggressive · 12 cm · Medium care · 24–28 °C (75–82 °F)
    • pH preferences only just meet (Tiger Betta 5–7 vs Powder Blue Cichlid 7.5–8.5) — target the overlap and acclimate slowly.
    • One likes softer water and the other harder (0–8 vs 10–20 dGH) — a compromise, not a perfect match.
    • Tiger Betta and Powder Blue Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
    • Your 75 L tank is below the ~170 L this pairing really wants — crowding raises aggression.
    • Keep Powder Blue Cichlid in a shoal of 6+ or it gets stressed and nippy.
  • Rubber Lip Pleco⚠️ With caution
    Peaceful · 12 cm · Easy care · 20–26 °C (68–79 °F)
    • Your 75 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
  • Striped Eel Loach⚠️ With caution
    Peaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
    • Your 75 L tank is below the ~95 L this pairing really wants — crowding raises aggression.
  • T-bar Cichlid⚠️ With caution
    Semi-aggressive · 12 cm · Medium care · 22–28 °C (72–82 °F)
    • Tiger Betta and T-bar Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
    • Your 75 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
  • Alligator Gar⛔ Not recommended
    Aggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
    • Tiger Betta and Alligator Gar are both territorial and at least one is outright aggressive — expect serious fighting.
    • Alligator Gar (250 cm) is big enough to swallow the 11 cm Tiger Betta whole.
    • Your 75 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)
    • Two assertive fish, one genuinely aggressive: Tiger Betta and Clown Knifefish will hold territory and clash.
    • Clown Knifefish (90 cm) is big enough to swallow the 11 cm Tiger Betta whole.
    • Your 75 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)
    • Tiger Betta is bite-sized to a 100 cm predatory fire eel — it will be eaten.
    • Tiger Betta and Fire Eel can both be territorial; doable with space and dense planting, but watch for chasing.
    • Your 75 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
  • Koi⛔ Not recommended
    Peaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
    • Size gap is too large (90 vs 11 cm): Koi will treat Tiger Betta as food.
    • One likes softer water and the other harder (0–8 vs 9–18 dGH) — a compromise, not a perfect match.
    • Your 75 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
  • Redtail Catfish⛔ Not recommended
    Aggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
    • Tiger Betta and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
    • Tiger Betta is bite-sized to a 120 cm predatory redtail catfish — it will be eaten.
    • Your 75 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)
    • Tiger Betta and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
    • Tiger Betta is bite-sized to a 90 cm predatory spotted gar — it will be eaten.
    • Your 75 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)
    • Tiger Betta and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
    • Wels Catfish (300 cm) is big enough to swallow the 11 cm Tiger Betta whole.
    • Your 75 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
  • Wolf Cichlid⛔ Not recommended
    Aggressive · 72 cm · Hard care · 24–30 °C (75–86 °F)
    • Two assertive fish, one genuinely aggressive: Tiger Betta and Wolf Cichlid will hold territory and clash.
    • Tiger Betta is bite-sized to a 72 cm predatory wolf cichlid — it will be eaten.
    • Your 75 L tank is below the ~760 L this pairing really wants — crowding raises aggression.

Compatibility is computed from each species' care data — a strong starting point, not a guarantee. Individual temperament varies, so always introduce new fish slowly and watch them.

Setting up a tiger betta community tank

Give the group a stable, planted 75 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 tiger betta

Being semi-aggressive, tiger betta can nip or harass smaller, slower or long-finned fish — give it space, broken sight-lines and similarly robust companions. It mostly occupies the middle of the tank, so it pairs naturally with species that use the other levels.

Tiger Betta grows to about 11 cm, so avoid tank mates small enough to be seen as food — as a rule of thumb, skip anything under roughly 6 cm. Match its water, too: aim for 22–27 °C (72–81 °F), pH 5–7 and 0–8 dGH. Fish needing very different conditions — coldwater species, or hard-water lovers against a soft-water fish — rarely thrive side by side.

Tiger Betta 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 tiger betta live with other fish?

Yes — with the right companions. Our checker finds 31 compatible freshwater species for tiger betta. 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 tiger betta?

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 tiger betta?

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 tiger betta tank mates need?

Start from Tiger Betta's own minimum and scale up with every addition. The checker above defaults to a 75 L community tank and flags pairings that need more room — drag the slider to match your setup.

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