Spotfin Betta Tank Mates

• 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, and their water overlaps around 23–28 °C — no size, zone or temperament conflicts.
  • Keep Axelrod's Cory in a shoal of 6+ or it gets stressed and nippy.
• Bandit Corydoras✅ Compatible
  Peaceful · 5 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 Bandit Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Blackline Rasbora✅ 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.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Blackline Rasbora in a shoal of 6+ or it gets stressed and nippy.
• 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, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
• Bloodfin Tetra✅ Compatible
  Peaceful · 5.5 cm · Easy care · 18–28 °C (64–82 °F)
  • Compatible on the things that matter: shared water near 23–28 °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 Bloodfin Tetra in a shoal of 6+ or it gets stressed and nippy.
• Butterfly Hillstream Loach✅ Compatible
  Peaceful · 6 cm · Hard care · 18–24 °C (64–75 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–24 °C — no size, zone or temperament conflicts.
• Diamond Tetra✅ Compatible
  Peaceful · 6 cm · Easy care · 22–28 °C (72–82 °F)
  • Semi-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 middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Diamond Tetra 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)
  • Compatible on the things that matter: shared water near 23–28 °C, workable temperaments, and no predator-and-prey size gap.
  • 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 23–26 °C — no size, zone or temperament conflicts.
  • Keep False Julii Corydoras in a shoal of 6+ or it gets stressed and nippy.
• German Blue Ram✅ Compatible
  Peaceful · 6 cm · Hard care · 27–30 °C (81–86 °F)
  • Compatible on the things that matter: shared water near 27–28 °C, workable temperaments, and no predator-and-prey size gap.
• Glass Bloodfin Tetra✅ Compatible
  Peaceful · 6 cm · Easy care · 22–28 °C (72–82 °F)
  • Compatible on the things that matter: shared water near 23–28 °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 Glass Bloodfin Tetra in a shoal of 6+ or it gets stressed and nippy.
• Hillstream Loach✅ Compatible
  Peaceful · 6 cm · Hard care · 20–24 °C (68–75 °F)
  • Compatible on the things that matter: shared water near 23–24 °C, workable temperaments, and no predator-and-prey size gap.
• Horseman Cory✅ Compatible
  Peaceful · 5 cm · Medium care · 22–26 °C (72–79 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Keep Horseman Cory in a shoal of 6+ or it gets stressed and nippy.
• Julii Corydoras✅ Compatible
  Peaceful · 5 cm · Easy care · 23–26 °C (73–79 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Keep Julii Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Masked Corydoras✅ Compatible
  Peaceful · 5 cm · Easy care · 22–28 °C (72–82 °F)
  • Compatible on the things that matter: shared water near 23–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
• 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.
• Neon Dwarf Rainbowfish✅ Compatible
  Peaceful · 6 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.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Neon Dwarf Rainbowfish in a shoal of 6+ or it gets stressed and nippy.
• Panda Corydoras✅ Compatible
  Peaceful · 5 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.
  • Keep Panda Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Pearl Danio✅ Compatible
  Peaceful · 6 cm · Easy care · 20–25 °C (68–77 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–25 °C — no size, zone or temperament conflicts.
  • Keep Pearl Danio in a shoal of 6+ or it gets stressed and nippy.
• Rust Corydoras✅ Compatible
  Peaceful · 5.5 cm · Easy care · 23–27 °C (73–81 °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 Rust Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Skunk Corydoras✅ Compatible
  Peaceful · 5 cm · Easy care · 22–26 °C (72–79 °F)
  • Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Keep Skunk Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Amano Shrimp⚠️ With caution
  Peaceful · 5 cm · Easy care · 18–28 °C (64–82 °F)
  • Water hardness preferences differ (Spotfin Betta 0–5 vs Amano Shrimp 6–15 dGH).
  • Adult Amano Shrimp might survive with Spotfin Betta, but expect the young to be eaten — plant heavily.
• Blue Turbo Snail⚠️ With caution
  Peaceful · 5 cm · Medium care · 25–30 °C (77–86 °F)
  • pH preferences only just meet (Spotfin Betta 4–6.5 vs Blue Turbo Snail 7.5–8.5) — target the overlap and acclimate slowly.
  • One likes softer water and the other harder (0–5 vs 8–18 dGH) — a compromise, not a perfect match.
• Checkered Barb⚠️ With caution
  Peaceful · 5 cm · Easy care · 20–25 °C (68–77 °F)
  • Spotfin Betta and Checkered Barb are close in size, but the semi-aggressive one tends to dominate — add checkered barb in a group to spread the pressure.
  • Keep Checkered Barb in a shoal of 6+ or it gets stressed and nippy.
• Cherry Barb⚠️ With caution
  Peaceful · 5 cm · Easy care · 23–27 °C (73–81 °F)
  • Spotfin Betta is semi-aggressive and may chase or nip the smaller Cherry Barb — plant heavily and break up sight lines.
  • Keep Cherry Barb in a shoal of 6+ or it gets stressed and nippy.
• Chocolate Gourami⚠️ With caution
  Peaceful · 5 cm · Hard care · 25–30 °C (77–86 °F)
  • Spotfin Betta is semi-aggressive and may chase or nip the smaller Chocolate Gourami — plant heavily and break up sight lines.
  • Spotfin Betta and Chocolate Gourami are both labyrinth fish and often treat each other as rivals — give a large, broken-up tank and be ready to separate them.
  • Keep Chocolate Gourami in a shoal of 6+ or it gets stressed and nippy.
• Cochu's Blue Tetra⚠️ With caution
  Peaceful · 5 cm · Medium care · 22–28 °C (72–82 °F)
  • Expect Spotfin Betta to harass Cochu's Blue Tetra at times; give dense cover and watch them at feeding.
  • Keep Cochu's Blue Tetra in a shoal of 8+ or it gets stressed and nippy.
• Firehead Tetra⚠️ With caution
  Peaceful · 5 cm · Medium care · 24–28 °C (75–82 °F)
  • Spotfin Betta is semi-aggressive and may chase or nip the smaller Firehead Tetra — plant heavily and break up sight lines.
  • Keep Firehead Tetra in a shoal of 8+ or it gets stressed and nippy.
• Five-banded Barb⚠️ With caution
  Peaceful · 5 cm · Easy care · 23–27 °C (73–81 °F)
  • Spotfin Betta is semi-aggressive and may chase or nip the smaller Five-banded Barb — plant heavily and break up sight lines.
  • Keep Five-banded Barb in a shoal of 6+ or it gets stressed and nippy.
• Forktail Blue-eye⚠️ With caution
  Peaceful · 5 cm · Easy care · 22–28 °C (72–82 °F)
  • Spotfin Betta is semi-aggressive and may chase or nip the smaller Forktail Blue-eye — plant heavily and break up sight lines.
  • Keep Forktail Blue-eye in a shoal of 6+ or it gets stressed and nippy.
• Half-striped Penguin Tetra⚠️ With caution
  Peaceful · 5 cm · Medium care · 23–28 °C (73–82 °F)
  • Spotfin Betta and Half-striped Penguin Tetra are close in size, but the semi-aggressive one tends to dominate — add half-striped penguin tetra in a group to spread the pressure.
  • Keep Half-striped Penguin Tetra in a shoal of 6+ or it gets stressed and nippy.
• Harlequin Rasbora⚠️ With caution
  Peaceful · 5 cm · Easy care · 23–28 °C (73–82 °F)
  • Spotfin Betta is semi-aggressive and may chase or nip the smaller Harlequin Rasbora — plant heavily and break up sight lines.
  • Keep Harlequin Rasbora in a shoal of 6+ or it gets stressed and nippy.
• Honey Gourami⚠️ With caution
  Peaceful · 5 cm · Easy care · 22–28 °C (72–82 °F)
  • Spotfin Betta and Honey Gourami are close in size, but the semi-aggressive one tends to dominate — add honey gourami in a group to spread the pressure.
  • Spotfin Betta and Honey Gourami are both labyrinth fish and often treat each other as rivals — give a large, broken-up tank and be ready to separate them.
• Humpbacked Tetra⚠️ With caution
  Semi-aggressive · 5 cm · Hard care · 24–28 °C (75–82 °F)
  • Spotfin Betta and Humpbacked Tetra can both be territorial; doable with space and dense planting, but watch for chasing.
  • Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
  • Keep Humpbacked Tetra in a shoal of 8+ or it gets stressed and nippy.
• Japanese Trapdoor Snail⚠️ With caution
  Peaceful · 5 cm · Easy care · 10–28 °C (50–82 °F)
  • pH preferences only just meet (Spotfin Betta 4–6.5 vs Japanese Trapdoor Snail 7–8) — target the overlap and acclimate slowly.
  • One likes softer water and the other harder (0–5 vs 6–15 dGH) — a compromise, not a perfect match.
• Morse Code Corydoras⚠️ With caution
  Peaceful · 5 cm · Medium care · 23–26 °C (73–79 °F)
  • Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
  • Keep Morse Code Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Mystery Snail⚠️ With caution
  Peaceful · 5 cm · Easy care · 20–28 °C (68–82 °F)
  • pH preferences only just meet (Spotfin Betta 4–6.5 vs Mystery Snail 7–8) — target the overlap and acclimate slowly.
  • One likes softer water and the other harder (0–5 vs 7–18 dGH) — a compromise, not a perfect match.
  • Spotfin Betta is semi-aggressive and may chase or nip the smaller Mystery Snail — plant heavily and break up sight lines.
• Alligator Gar⛔ Not recommended
  Aggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
  • Spotfin 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 5 cm Spotfin Betta whole.
  • Different pH ranges (4–6.5 vs 6.8–7.8); doable if you sit in the shared band, but not ideal long-term.
  • 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: Spotfin Betta and Clown Knifefish will hold territory and clash.
  • Size gap is too large (90 vs 5 cm): Clown Knifefish will treat Spotfin Betta as food.
  • 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)
  • Size gap is too large (100 vs 5 cm): Fire Eel will treat Spotfin Betta as food.
  • Spotfin 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)
  • Koi (90 cm) is big enough to swallow the 5 cm Spotfin Betta whole.
  • One likes softer water and the other harder (0–5 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)
  • Spotfin Betta and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Redtail Catfish (120 cm) is big enough to swallow the 5 cm Spotfin Betta whole.
  • 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)
  • Spotfin Betta and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
  • Spotted Gar (90 cm) is big enough to swallow the 5 cm Spotfin Betta whole.
  • 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)
  • Spotfin Betta and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Spotfin Betta is bite-sized to a 300 cm predatory wels catfish — it will be eaten.
  • 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: Spotfin Betta and Wolf Cichlid will hold territory and clash.
  • Spotfin Betta is bite-sized to a 72 cm predatory wolf cichlid — it will be eaten.
  • pH preferences only just meet (Spotfin Betta 4–6.5 vs Wolf Cichlid 7–8) — target the overlap and acclimate slowly.
  • One likes softer water and the other harder (0–5 vs 8–20 dGH) — a compromise, not a perfect match.
  • 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.