Neon Blue Rasbora Tank Mates

Neon Blue Rasbora is peaceful, so its tank mates need choosing with care. Here are the 119 freshwater species that pair well with a neon blue rasbora — plus the 99 to avoid — with a live checker you can tune to your own tank.

By The Aquarium DB Team • Updated June 8, 2026 • Full Neon Blue Rasbora care guide →
Best matches

The best tank mates for a neon blue rasbora

  • Ember Tetra ✅ Compatible
    Easy care · Peaceful · 2 cm · 24–28 °C (75–82 °F)
    Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Neon Green Rasbora ✅ Compatible
    Easy care · Peaceful · 2 cm · 22–26 °C (72–79 °F)
    Both are peaceful, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Dawn Tetra ✅ Compatible
    Easy care · Peaceful · 2.5 cm · 22–28 °C (72–82 °F)
    Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Cherry Shrimp ✅ Compatible
    Easy care · Peaceful · 3 cm · 18–28 °C (64–82 °F)
    Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Glowlight Danio ✅ Compatible
    Easy care · Peaceful · 3 cm · 22–26 °C (72–79 °F)
    Both are peaceful, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Gold Ring Danio ✅ Compatible
    Easy care · Peaceful · 3 cm · 18–26 °C (64–79 °F)
    Both are peaceful, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Neon Tetra ✅ Compatible
    Easy care · Peaceful · 3 cm · 20–26 °C (68–79 °F)
    Both are peaceful, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Tail-spot Corydoras ✅ Compatible
    Easy care · Peaceful · 3 cm · 22–28 °C (72–82 °F)
    Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Pygmy Corydoras ✅ Compatible
    Easy care · Peaceful · 3.2 cm · 22–26 °C (72–79 °F)
    Both are peaceful, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Glowlight Rasbora ✅ Compatible
    Easy care · Peaceful · 3.5 cm · 23–28 °C (73–82 °F)
    Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Blue Danio ✅ Compatible
    Easy care · Peaceful · 4 cm · 21–26 °C (70–79 °F)
    Both are peaceful, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Emperor Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 23–27 °C (73–81 °F)
    Both are peaceful, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Flame Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 22–28 °C (72–82 °F)
    Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Ghost Shrimp ✅ Compatible
    Easy care · Peaceful · 4 cm · 18–28 °C (64–82 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Glowlight Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 22–28 °C (72–82 °F)
    Both are peaceful, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Golden Dwarf Barb ✅ Compatible
    Easy care · Peaceful · 4 cm · 18–24 °C (64–75 °F)
    Compatible on the things that matter: shared water near 23–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Phoenix Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 23–28 °C (73–82 °F)
    Both are peaceful, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Red Phantom Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 22–28 °C (72–82 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Rosy Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 22–28 °C (72–82 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Yellow Phantom Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 23–27 °C (73–81 °F)
    Both are peaceful, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
  • Black Phantom Tetra ✅ Compatible
    Easy care · Peaceful · 4.5 cm · 22–28 °C (72–82 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Gold Tetra ✅ Compatible
    Easy care · Peaceful · 4.5 cm · 23–28 °C (73–82 °F)
    Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
  • Lemon Tetra ✅ Compatible
    Easy care · Peaceful · 4.5 cm · 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.
  • X-ray Tetra ✅ Compatible
    Easy care · Peaceful · 4.5 cm · 22–28 °C (72–82 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
With caution

Neon Blue Rasbora tank mates that can work with care

  • African Butterfly Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 8 cm · 22–28 °C (72–82 °F)
    African Butterfly Cichlid is semi-aggressive and may chase or nip the smaller Neon Blue Rasbora — plant heavily and break up sight lines.
  • African Dwarf Frog ⚠️ With caution
    Medium care · Peaceful · 4 cm · 22–26 °C (72–79 °F)
    Different pH ranges (4–6.5 vs 6.8–7.8); doable if you sit in the shared band, but not ideal long-term.
  • Amazon Puffer ⚠️ With caution
    Medium care · Peaceful · 8 cm · 23–28 °C (73–82 °F)
    Your 75 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
  • Angelfish ⚠️ With caution
    Medium care · Semi-aggressive · 15 cm · 24–30 °C (75–86 °F)
    Angelfish is semi-aggressive and may chase or nip the smaller Neon Blue Rasbora — plant heavily and break up sight lines.
  • Assassin Snail ⚠️ With caution
    Easy care · Peaceful · 3 cm · 22–26 °C (72–79 °F)
    One likes softer water and the other harder (1–6 vs 8–20 dGH) — a compromise, not a perfect match.
  • Banded Gourami ⚠️ With caution
    Easy care · Semi-aggressive · 12 cm · 22–28 °C (72–82 °F)
    Banded Gourami is semi-aggressive and may chase or nip the smaller Neon Blue Rasbora — plant heavily and break up sight lines.
  • Bandit Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 9 cm · 22–26 °C (72–79 °F)
    Bandit Cichlid clearly outsizes Neon Blue Rasbora and is semi-aggressive; risky unless the tank is big and well-planted.
  • Bearded Corydoras ⚠️ With caution
    Medium care · Peaceful · 10 cm · 18–24 °C (64–75 °F)
    Your 75 L tank is below the ~80 L this pairing really wants — crowding raises aggression.

+ 114 more “with caution” pairings — see the interactive checker above.

Avoid

Fish to avoid keeping with a neon blue rasbora

  • Wels Catfish ⛔ Avoid
    Hard care · Aggressive · 300 cm · 15–25 °C (59–77 °F)
    Wels Catfish (300 cm) is big enough to swallow the 2.5 cm Neon Blue Rasbora whole.
  • Alligator Gar ⛔ Avoid
    Hard care · Aggressive · 250 cm · 24–28 °C (75–82 °F)
    Size gap is too large (250 vs 2.5 cm): Alligator Gar will treat Neon Blue Rasbora as food.
  • Redtail Catfish ⛔ Avoid
    Hard care · Aggressive · 120 cm · 24–27 °C (75–81 °F)
    Neon Blue Rasbora is bite-sized to a 120 cm predatory redtail catfish — it will be eaten.
  • Fire Eel ⛔ Avoid
    Medium care · Semi-aggressive · 100 cm · 24–28 °C (75–82 °F)
    Fire Eel (100 cm) is big enough to swallow the 2.5 cm Neon Blue Rasbora whole.
  • Clown Knifefish ⛔ Avoid
    Hard care · Aggressive · 90 cm · 24–28 °C (75–82 °F)
    Clown Knifefish (90 cm) is big enough to swallow the 2.5 cm Neon Blue Rasbora whole.
  • Koi ⛔ Avoid
    Medium care · Peaceful · 90 cm · 4–28 °C (39–82 °F)
    Koi (90 cm) is big enough to swallow the 2.5 cm Neon Blue Rasbora whole.
  • Spotted Gar ⛔ Avoid
    Hard care · Aggressive · 90 cm · 18–26 °C (64–79 °F)
    Neon Blue Rasbora is bite-sized to a 90 cm predatory spotted gar — it will be eaten.
  • Wolf Cichlid ⛔ Avoid
    Hard care · Aggressive · 72 cm · 24–30 °C (75–86 °F)
    Neon Blue Rasbora is bite-sized to a 72 cm predatory wolf cichlid — it will be eaten.

+ 91 more to avoid — the checker above flags every one.

Interactive tool

Check any fish against a neon blue rasbora

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

Tank-mate checker

Will it live with a Neon Blue Rasbora?

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

  • Blackwing Hatchetfish✅ Compatible
    Peaceful · 3.5 cm · Medium care · 23–28 °C (73–82 °F)
    • Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Blackwing Hatchetfish in a shoal of 6+ or it gets stressed and nippy.
  • Celestial Pearl Danio✅ Compatible
    Peaceful · 2 cm · Medium care · 22–26 °C (72–79 °F)
    • Both are peaceful, and their water overlaps around 23–26 °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 Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Celestial Pearl Danio in a shoal of 6+ or it gets stressed and nippy.
  • Cherry Shrimp✅ Compatible
    Peaceful · 3 cm · Easy care · 18–28 °C (64–82 °F)
    • Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Cherry Shrimp in a shoal of 10+ or it gets stressed and nippy.
  • Chili Rasbora✅ Compatible
    Peaceful · 2 cm · Medium care · 22–28 °C (72–82 °F)
    • Compatible on the things that matter: shared water near 23–26 °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 Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Chili Rasbora in a shoal of 8+ or it gets stressed and nippy.
  • Clown Killifish✅ Compatible
    Peaceful · 3.5 cm · Medium 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 Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Clown Killifish in a shoal of 6+ or it gets stressed and nippy.
  • Crimson Red Betta✅ Compatible
    Peaceful · 3.5 cm · Hard care · 24–29 °C (75–84 °F)
    • Both are peaceful, and their water overlaps around 24–26 °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 Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Crystal Red Shrimp✅ Compatible
    Peaceful · 2.5 cm · Hard care · 20–24 °C (68–75 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Crystal Red Shrimp in a shoal of 10+ or it gets stressed and nippy.
  • Dawn Tetra✅ Compatible
    Peaceful · 2.5 cm · Easy care · 22–28 °C (72–82 °F)
    • Compatible on the things that matter: shared water near 23–26 °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 Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Dawn Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Dwarf Spotted Rasbora✅ Compatible
    Peaceful · 2.5 cm · Medium care · 23–28 °C (73–82 °F)
    • Both are peaceful, and their water overlaps around 23–26 °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 Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Dwarf Spotted Rasbora in a shoal of 8+ or it gets stressed and nippy.
  • Ember Tetra✅ Compatible
    Peaceful · 2 cm · Easy care · 24–28 °C (75–82 °F)
    • Compatible on the things that matter: shared water near 24–26 °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 Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Ember Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Exclamation Point Rasbora✅ Compatible
    Peaceful · 2 cm · Medium care · 22–28 °C (72–82 °F)
    • Both are peaceful, and their water overlaps around 23–26 °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 Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Exclamation Point Rasbora in a shoal of 8+ or it gets stressed and nippy.
  • Glowlight Danio✅ Compatible
    Peaceful · 3 cm · Easy care · 22–26 °C (72–79 °F)
    • Both are peaceful, and their water overlaps around 23–26 °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 Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Glowlight Danio in a shoal of 8+ or it gets stressed and nippy.
  • Gold Ring Danio✅ Compatible
    Peaceful · 3 cm · Easy care · 18–26 °C (64–79 °F)
    • Both are peaceful, and their water overlaps around 23–26 °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 Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Gold Ring Danio in a shoal of 8+ or it gets stressed and nippy.
  • Green Neon Tetra✅ Compatible
    Peaceful · 2.5 cm · Hard care · 24–28 °C (75–82 °F)
    • Both are peaceful, and their water overlaps around 24–26 °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 Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Green Neon Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Hummingbird Tetra✅ Compatible
    Peaceful · 1.8 cm · Hard care · 22–27 °C (72–81 °F)
    • Compatible on the things that matter: shared water near 23–26 °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 Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Hummingbird Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Lambchop Rasbora✅ Compatible
    Peaceful · 3 cm · Medium 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.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Lambchop Rasbora in a shoal of 6+ or it gets stressed and nippy.
  • Neon Green Rasbora✅ Compatible
    Peaceful · 2 cm · Easy care · 22–26 °C (72–79 °F)
    • Both are peaceful, and their water overlaps around 23–26 °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 Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Neon Green Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Neon Tetra✅ Compatible
    Peaceful · 3 cm · Easy care · 20–26 °C (68–79 °F)
    • Both are peaceful, and their water overlaps around 23–26 °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 Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Neon Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Pygmy Corydoras✅ Compatible
    Peaceful · 3.2 cm · Easy care · 22–26 °C (72–79 °F)
    • Both are peaceful, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Pygmy Corydoras in a shoal of 8+ or it gets stressed and nippy.
  • Ruby Tetra✅ Compatible
    Peaceful · 2 cm · Medium care · 23–28 °C (73–82 °F)
    • Compatible on the things that matter: shared water near 23–26 °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 Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Ruby Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Scarlet Badis✅ Compatible
    Semi-aggressive · 2 cm · Medium care · 22–27 °C (72–81 °F)
    • Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Strawberry Rasbora✅ Compatible
    Peaceful · 2 cm · Medium care · 23–28 °C (73–82 °F)
    • Compatible on the things that matter: shared water near 23–26 °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 Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Strawberry Rasbora in a shoal of 8+ or it gets stressed and nippy.
  • Tail-spot Corydoras✅ Compatible
    Peaceful · 3 cm · Easy care · 22–28 °C (72–82 °F)
    • Compatible on the things that matter: shared water near 23–26 °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 Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Tail-spot Corydoras in a shoal of 8+ or it gets stressed and nippy.
  • Tiger Shrimp✅ Compatible
    Peaceful · 3 cm · Hard care · 20–25 °C (68–77 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
  • African Dwarf Frog⚠️ With caution
    Peaceful · 4 cm · Medium care · 22–26 °C (72–79 °F)
    • Different pH ranges (4–6.5 vs 6.8–7.8); doable if you sit in the shared band, but not ideal long-term.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Assassin Snail⚠️ With caution
    Peaceful · 3 cm · Easy care · 22–26 °C (72–79 °F)
    • One likes softer water and the other harder (1–6 vs 8–20 dGH) — a compromise, not a perfect match.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Black Darter Tetra⚠️ With caution
    Semi-aggressive · 4 cm · Hard care · 21–28 °C (70–82 °F)
    • Black Darter Tetra clearly outsizes Neon Blue Rasbora and is semi-aggressive; risky unless the tank is big and well-planted.
    • Watch for Black Darter Tetra picking off any neon blue rasbora small enough to fit in its mouth.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Emerald Dwarf Danio⚠️ With caution
    Peaceful · 2 cm · Medium care · 20–24 °C (68–75 °F)
    • pH preferences only just meet (Neon Blue Rasbora 4–6.5 vs Emerald Dwarf Danio 7–8) — target the overlap and acclimate slowly.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Emerald Dwarf Danio in a shoal of 8+ or it gets stressed and nippy.
  • Endler's Livebearer⚠️ With caution
    Peaceful · 3 cm · Easy care · 22–28 °C (72–82 °F)
    • pH preferences only just meet (Neon Blue Rasbora 4–6.5 vs Endler's Livebearer 7–8.5) — target the overlap and acclimate slowly.
    • One likes softer water and the other harder (1–6 vs 10–25 dGH) — a compromise, not a perfect match.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Endler's Livebearer in a shoal of 6+ or it gets stressed and nippy.
  • Malaysian Trumpet Snail⚠️ With caution
    Peaceful · 3 cm · Easy care · 21–27 °C (70–81 °F)
    • pH preferences only just meet (Neon Blue Rasbora 4–6.5 vs Malaysian Trumpet Snail 7–8) — target the overlap and acclimate slowly.
    • One likes softer water and the other harder (1–6 vs 8–18 dGH) — a compromise, not a perfect match.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Nerite Snail⚠️ With caution
    Peaceful · 2.5 cm · Easy care · 22–28 °C (72–82 °F)
    • pH preferences only just meet (Neon Blue Rasbora 4–6.5 vs Nerite Snail 7–8.5) — target the overlap and acclimate slowly.
    • One likes softer water and the other harder (1–6 vs 8–18 dGH) — a compromise, not a perfect match.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Pea Puffer⚠️ With caution
    Semi-aggressive · 2.5 cm · Medium care · 24–28 °C (75–82 °F)
    • Pea Puffer and Neon Blue Rasbora are close in size, but the semi-aggressive one tends to dominate — add neon blue rasbora in a group to spread the pressure.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Rainbow Emperor Tetra⚠️ With caution
    Semi-aggressive · 3.6 cm · Medium care · 22–28 °C (72–82 °F)
    • Rainbow Emperor Tetra is semi-aggressive and may chase or nip the smaller Neon Blue Rasbora — plant heavily and break up sight lines.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Rainbow Emperor Tetra in a shoal of 8+ or it gets stressed and nippy.
  • Ramshorn Snail⚠️ With caution
    Peaceful · 2 cm · Easy care · 20–28 °C (68–82 °F)
    • Different pH ranges (4–6.5 vs 7–8); doable if you sit in the shared band, but not ideal long-term.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Red Lip Nerite Snail⚠️ With caution
    Peaceful · 2 cm · Easy care · 22–28 °C (72–82 °F)
    • pH preferences only just meet (Neon Blue Rasbora 4–6.5 vs Red Lip Nerite Snail 7–8) — target the overlap and acclimate slowly.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Rummy Nose Rasbora⚠️ With caution
    Peaceful · 4 cm · Medium care · 20–26 °C (68–79 °F)
    • pH preferences only just meet (Neon Blue Rasbora 4–6.5 vs Rummy Nose Rasbora 7–8) — target the overlap and acclimate slowly.
    • One likes softer water and the other harder (1–6 vs 8–16 dGH) — a compromise, not a perfect match.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Rummy Nose Rasbora in a shoal of 8+ or it gets stressed and nippy.
  • Serpae Tetra⚠️ With caution
    Semi-aggressive · 4 cm · Easy care · 23–28 °C (73–82 °F)
    • Serpae Tetra clearly outsizes Neon Blue Rasbora and is semi-aggressive; risky unless the tank is big and well-planted.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
    • Keep Serpae Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Tiger Badis⚠️ With caution
    Semi-aggressive · 4 cm · Medium care · 22–24 °C (72–75 °F)
    • Expect Tiger Badis to harass Neon Blue Rasbora at times; give dense cover and watch them at feeding.
    • Tiger Badis may hunt Neon Blue Rasbora, fry or shrimplets — safest in a heavily planted tank.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Trinidad Guppy⚠️ With caution
    Peaceful · 3 cm · Easy care · 19–24 °C (66–75 °F)
    • pH preferences only just meet (Neon Blue Rasbora 4–6.5 vs Trinidad Guppy 6.6–7.5) — target the overlap and acclimate slowly.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Wine Red Betta⚠️ With caution
    Aggressive · 5 cm · Medium care · 24–28 °C (75–82 °F)
    • Wine Red Betta clearly outsizes Neon Blue Rasbora and is aggressive; risky unless the tank is big and well-planted.
    • Watch for Wine Red Betta picking off any neon blue rasbora small enough to fit in its mouth.
    • Keep Neon Blue Rasbora in a shoal of 10+ 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 2.5 cm): Alligator Gar will treat Neon Blue Rasbora as food.
    • Different pH ranges (4–6.5 vs 6.8–7.8); doable if you sit in the shared band, but not ideal long-term.
    • Expect Alligator Gar to harass Neon Blue Rasbora at times; give dense cover and watch them at feeding.
    • Your 75 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Clown Knifefish⛔ Not recommended
    Aggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
    • Clown Knifefish (90 cm) is big enough to swallow the 2.5 cm Neon Blue Rasbora whole.
    • Clown Knifefish is aggressive and may chase or nip the smaller Neon Blue Rasbora — plant heavily and break up sight lines.
    • Your 75 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Fire Eel⛔ Not recommended
    Semi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
    • Fire Eel (100 cm) is big enough to swallow the 2.5 cm Neon Blue Rasbora whole.
    • Expect Fire Eel to harass Neon Blue Rasbora 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 Neon Blue Rasbora in a shoal of 10+ 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 2.5 cm Neon Blue Rasbora whole.
    • One likes softer water and the other harder (1–6 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.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Redtail Catfish⛔ Not recommended
    Aggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
    • Neon Blue Rasbora is bite-sized to a 120 cm predatory redtail catfish — it will be eaten.
    • Expect Redtail Catfish to harass Neon Blue Rasbora 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 Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Spotted Gar⛔ Not recommended
    Aggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
    • Neon Blue Rasbora is bite-sized to a 90 cm predatory spotted gar — it will be eaten.
    • Expect Spotted Gar to harass Neon Blue Rasbora at times; give dense cover and watch them at feeding.
    • Your 75 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Wels Catfish⛔ Not recommended
    Aggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
    • Wels Catfish (300 cm) is big enough to swallow the 2.5 cm Neon Blue Rasbora whole.
    • Expect Wels Catfish to harass Neon Blue Rasbora at times; give dense cover and watch them at feeding.
    • Your 75 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
    • Keep Neon Blue Rasbora in a shoal of 10+ or it gets stressed and nippy.
  • Wolf Cichlid⛔ Not recommended
    Aggressive · 72 cm · Hard care · 24–30 °C (75–86 °F)
    • Neon Blue Rasbora is bite-sized to a 72 cm predatory wolf cichlid — it will be eaten.
    • pH preferences only just meet (Neon Blue Rasbora 4–6.5 vs Wolf Cichlid 7–8) — target the overlap and acclimate slowly.
    • One likes softer water and the other harder (1–6 vs 8–20 dGH) — a compromise, not a perfect match.
    • Wolf Cichlid clearly outsizes Neon Blue Rasbora 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 Neon Blue Rasbora in a shoal of 10+ 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.

Setting up a neon blue rasbora 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 neon blue rasbora

As a peaceful species, neon blue rasbora is easily bullied — favour other calm, non-nippy fish and steer clear of boisterous or aggressive tank mates. It mostly occupies the middle of the tank, so it pairs naturally with species that use the other levels.

Neon Blue Rasbora grows to about 2.5 cm, so avoid tank mates small enough to be seen as food — as a rule of thumb, skip anything under roughly 2 cm. Match its water, too: aim for 23–26 °C (73–79 °F), pH 4–6.5 and 1–6 dGH. Fish needing very different conditions — coldwater species, or hard-water lovers against a soft-water fish — rarely thrive side by side.

Neon Blue Rasbora is a shoaling fish — stock a group of 10+ of its own kind first, then build compatible tank mates around them. 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 neon blue rasbora live with other fish?

Yes — with the right companions. Our checker finds 119 compatible freshwater species for neon blue rasbora. 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 neon blue rasbora?

Easy, peaceful, similarly-sized species top the list — for example Ember Tetra, Neon Green Rasbora, Dawn Tetra. Use the checker above to match against your own tank size.

What fish should you avoid keeping with a neon blue rasbora?

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 neon blue rasbora tank mates need?

Start from Neon Blue Rasbora'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.

← Back to the full Neon Blue Rasbora care guide