X-ray Tetra Tank Mates

• Amano Shrimp✅ Compatible
  Peaceful · 5 cm · Easy care · 18–28 °C (64–82 °F)
  • Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Keep X-ray Tetra 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)
  • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • 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)
  • Both are peaceful, and their water overlaps around 22–27 °C — no size, zone or temperament conflicts.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Bandit Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Black Phantom Tetra✅ Compatible
  Peaceful · 4.5 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 middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Black Phantom Tetra in a shoal of 6+ or it gets stressed and nippy.
• Blue Turbo Snail✅ Compatible
  Peaceful · 5 cm · Medium care · 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.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
• Checkered Barb✅ Compatible
  Peaceful · 5 cm · Easy care · 20–25 °C (68–77 °F)
  • Both are peaceful, 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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Checkered Barb in a shoal of 6+ or it gets stressed and nippy.
• Cherry Barb✅ Compatible
  Peaceful · 5 cm · Easy care · 23–27 °C (73–81 °F)
  • Both are peaceful, and their water overlaps around 23–27 °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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Cherry Barb in a shoal of 6+ or it gets stressed and nippy.
• Chocolate Gourami✅ Compatible
  Peaceful · 5 cm · Hard care · 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.
  • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Chocolate Gourami in a shoal of 6+ or it gets stressed and nippy.
• Cochu's Blue Tetra✅ Compatible
  Peaceful · 5 cm · Medium care · 22–28 °C (72–82 °F)
  • Both are peaceful, and their water overlaps around 22–28 °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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Cochu's Blue Tetra in a shoal of 8+ or it gets stressed and nippy.
• Firehead Tetra✅ Compatible
  Peaceful · 5 cm · Medium care · 24–28 °C (75–82 °F)
  • Both are peaceful, and their water overlaps around 24–28 °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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Firehead Tetra in a shoal of 8+ or it gets stressed and nippy.
• Five-banded Barb✅ Compatible
  Peaceful · 5 cm · Easy care · 23–27 °C (73–81 °F)
  • Both are peaceful; 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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Five-banded Barb in a shoal of 6+ or it gets stressed and nippy.
• Forktail Blue-eye✅ Compatible
  Peaceful · 5 cm · Easy care · 22–28 °C (72–82 °F)
  • Both are peaceful, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Forktail Blue-eye in a shoal of 6+ or it gets stressed and nippy.
• Gold Tetra✅ Compatible
  Peaceful · 4.5 cm · Easy care · 23–28 °C (73–82 °F)
  • Both are peaceful, 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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Gold Tetra in a shoal of 6+ or it gets stressed and nippy.
• Half-striped Penguin Tetra✅ Compatible
  Peaceful · 5 cm · Medium care · 23–28 °C (73–82 °F)
  • Both are peaceful, 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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Half-striped Penguin Tetra in a shoal of 6+ or it gets stressed and nippy.
• Harlequin Rasbora✅ Compatible
  Peaceful · 5 cm · Easy care · 23–28 °C (73–82 °F)
  • Both are peaceful, 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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Harlequin Rasbora in a shoal of 6+ or it gets stressed and nippy.
• Honey Gourami✅ Compatible
  Peaceful · 5 cm · Easy care · 22–28 °C (72–82 °F)
  • Both are peaceful, and their water overlaps around 22–28 °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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
• Horseman Cory✅ Compatible
  Peaceful · 5 cm · Medium 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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Horseman Cory in a shoal of 6+ or it gets stressed and nippy.
• Japanese Trapdoor Snail✅ Compatible
  Peaceful · 5 cm · Easy care · 10–28 °C (50–82 °F)
  • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Keep X-ray Tetra 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)
  • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Julii Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Lemon Tetra✅ Compatible
  Peaceful · 4.5 cm · Easy care · 23–28 °C (73–82 °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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Lemon Tetra 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)
  • Both are peaceful, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Masked Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Mystery Snail✅ Compatible
  Peaceful · 5 cm · Easy care · 20–28 °C (68–82 °F)
  • Compatible on the things that matter: shared water near 22–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Keep X-ray Tetra 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)
  • Compatible on the things that matter: shared water near 22–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Panda Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Yellow Tetra✅ Compatible
  Peaceful · 4.5 cm · Easy care · 20–25 °C (68–77 °F)
  • Both are peaceful, 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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Yellow Tetra in a shoal of 6+ or it gets stressed and nippy.
• Black Ruby Barb⚠️ With caution
  Semi-aggressive · 6 cm · Easy care · 22–26 °C (72–79 °F)
  • Black Ruby Barb is semi-aggressive and may chase or nip the smaller X-ray Tetra — plant heavily and break up sight lines.
  • Your 75 L tank is below the ~100 L this pairing really wants — crowding raises aggression.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Black Ruby Barb in a shoal of 6+ or it gets stressed and nippy.
• Black Skirt Tetra⚠️ With caution
  Semi-aggressive · 6 cm · Easy care · 20–26 °C (68–79 °F)
  • Black Skirt Tetra is semi-aggressive and may chase or nip the smaller X-ray Tetra — plant heavily and break up sight lines.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Black Skirt Tetra in a shoal of 6+ or it gets stressed and nippy.
• Desert Goby⚠️ With caution
  Semi-aggressive · 6 cm · Easy care · 18–28 °C (64–82 °F)
  • Desert Goby is semi-aggressive and may chase or nip the smaller X-ray Tetra — plant heavily and break up sight lines.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
• Dwarf Chain Loach⚠️ With caution
  Peaceful · 6 cm · Medium care · 24–29 °C (75–84 °F)
  • Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Dwarf Chain Loach in a shoal of 6+ or it gets stressed and nippy.
• Eastern Betta⚠️ With caution
  Semi-aggressive · 6 cm · Medium care · 24–28 °C (75–82 °F)
  • Eastern Betta is semi-aggressive and may chase or nip the smaller X-ray Tetra — plant heavily and break up sight lines.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
• Ghost Shrimp⚠️ With caution
  Peaceful · 4 cm · Easy care · 18–28 °C (64–82 °F)
  • X-ray Tetra may eat Ghost Shrimp or pick off its shrimplets — a densely planted tank with moss gives them a fighting chance.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Ghost Shrimp in a shoal of 6+ or it gets stressed and nippy.
• GloFish Tetra⚠️ With caution
  Semi-aggressive · 6 cm · Easy care · 21–28 °C (70–82 °F)
  • GloFish Tetra is semi-aggressive and may chase or nip the smaller X-ray Tetra — plant heavily and break up sight lines.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep GloFish Tetra in a shoal of 6+ or it gets stressed and nippy.
• Humpbacked Tetra⚠️ With caution
  Semi-aggressive · 5 cm · Hard care · 24–28 °C (75–82 °F)
  • Expect Humpbacked Tetra to harass X-ray Tetra at times; give dense cover and watch them at feeding.
  • Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Humpbacked Tetra in a shoal of 8+ or it gets stressed and nippy.
• 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 X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Morse Code Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Odessa Barb⚠️ With caution
  Semi-aggressive · 6 cm · Easy care · 20–26 °C (68–79 °F)
  • Odessa Barb is semi-aggressive and may chase or nip the smaller X-ray Tetra — plant heavily and break up sight lines.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Odessa Barb in a shoal of 6+ or it gets stressed and nippy.
• Peaceful Betta⚠️ With caution
  Semi-aggressive · 6 cm · Medium care · 24–28 °C (75–82 °F)
  • Expect Peaceful Betta to harass X-ray Tetra at times; give dense cover and watch them at feeding.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
• Silvertip Tetra⚠️ With caution
  Semi-aggressive · 5 cm · Easy care · 22–28 °C (72–82 °F)
  • Expect Silvertip Tetra to harass X-ray Tetra at times; give dense cover and watch them at feeding.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Keep Silvertip Tetra in a shoal of 6+ or it gets stressed and nippy.
• Smaragd Betta⚠️ With caution
  Aggressive · 6 cm · Medium care · 23–28 °C (73–82 °F)
  • Expect Smaragd Betta to harass X-ray Tetra at times; give dense cover and watch them at feeding.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
• Spotfin Betta⚠️ With caution
  Semi-aggressive · 5 cm · Medium care · 23–28 °C (73–82 °F)
  • Spotfin Betta and X-ray Tetra are close in size, but the semi-aggressive one tends to dominate — add x-ray tetra in a group to spread the pressure.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
• Striped Red-Eye Puffer⚠️ With caution
  Aggressive · 5 cm · Hard care · 24–28 °C (75–82 °F)
  • Striped Red-Eye Puffer is aggressive and may chase or nip the smaller X-ray Tetra — plant heavily and break up sight lines.
  • Keep X-ray Tetra in a shoal of 6+ or it gets stressed and nippy.
• Wine Red Betta⚠️ With caution
  Aggressive · 5 cm · Medium care · 24–28 °C (75–82 °F)
  • Expect Wine Red Betta to harass X-ray Tetra at times; give dense cover and watch them at feeding.
  • Keep X-ray Tetra 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 4.5 cm): Alligator Gar will treat X-ray Tetra as food.
  • Alligator Gar clearly outsizes X-ray Tetra and is aggressive; risky unless the tank is big and well-planted.
  • Your 75 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
  • Keep X-ray Tetra 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)
  • X-ray Tetra is bite-sized to a 90 cm predatory clown knifefish — it will be eaten.
  • Clown Knifefish clearly outsizes X-ray Tetra and is aggressive; risky unless the tank is big and well-planted.
  • Your 75 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
  • Keep X-ray Tetra 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)
  • X-ray Tetra is bite-sized to a 100 cm predatory fire eel — it will be eaten.
  • Expect Fire Eel to harass X-ray Tetra at times; give dense cover and watch them at feeding.
  • Your 75 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
  • Keep X-ray Tetra 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)
  • Size gap is too large (90 vs 4.5 cm): Koi will treat X-ray Tetra as food.
  • Your 75 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
  • Keep X-ray Tetra 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 4.5 cm X-ray Tetra whole.
  • Expect Redtail Catfish to harass X-ray Tetra at times; give dense cover and watch them at feeding.
  • Your 75 L tank is below the ~5700 L this pairing really wants — crowding raises aggression.
  • Keep X-ray Tetra 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)
  • X-ray Tetra is bite-sized to a 90 cm predatory spotted gar — it will be eaten.
  • Spotted Gar clearly outsizes X-ray Tetra and is aggressive; risky unless the tank is big and well-planted.
  • Your 75 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
  • Keep X-ray Tetra 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 4.5 cm): Wels Catfish will treat X-ray Tetra as food.
  • Wels Catfish is aggressive and may chase or nip the smaller X-ray Tetra — plant heavily and break up sight lines.
  • Your 75 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
  • Keep X-ray Tetra 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)
  • Wolf Cichlid (72 cm) is big enough to swallow the 4.5 cm X-ray Tetra whole.
  • Wolf Cichlid clearly outsizes X-ray Tetra and is aggressive; risky unless the tank is big and well-planted.
  • Your 75 L tank is below the ~760 L this pairing really wants — crowding raises aggression.
  • Keep X-ray Tetra 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.