Trinidad Guppy Tank Mates

Trinidad Guppy is peaceful, so its tank mates need choosing with care. Here are the 129 freshwater species that pair well with a trinidad guppy — plus the 101 to avoid — with a live checker you can tune to your own tank.

By The Aquarium DB Team • Updated June 8, 2026 • Full Trinidad Guppy care guide →
Best matches

The best tank mates for a trinidad guppy

  • Ember Tetra ✅ Compatible
    Easy care · Peaceful · 2 cm · 24–28 °C (75–82 °F)
    Compatible on the things that matter: shared water near 24–24 °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 22–24 °C — no size, zone or temperament conflicts.
  • Ramshorn Snail ✅ Compatible
    Easy care · Peaceful · 2 cm · 20–28 °C (68–82 °F)
    Compatible on the things that matter: shared water near 20–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Red Lip Nerite Snail ✅ Compatible
    Easy care · Peaceful · 2 cm · 22–28 °C (72–82 °F)
    Both are peaceful, and their water overlaps around 22–24 °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 22–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Nerite Snail ✅ Compatible
    Easy care · Peaceful · 2.5 cm · 22–28 °C (72–82 °F)
    Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Assassin Snail ✅ Compatible
    Easy care · Peaceful · 3 cm · 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.
  • Cherry Shrimp ✅ Compatible
    Easy care · Peaceful · 3 cm · 18–28 °C (64–82 °F)
    Compatible on the things that matter: shared water near 19–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Endler's Livebearer ✅ Compatible
    Easy care · Peaceful · 3 cm · 22–28 °C (72–82 °F)
    Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Glowlight Danio ✅ Compatible
    Easy care · Peaceful · 3 cm · 22–26 °C (72–79 °F)
    Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Gold Ring Danio ✅ Compatible
    Easy care · Peaceful · 3 cm · 18–26 °C (64–79 °F)
    Both are peaceful, and their water overlaps around 19–24 °C — no size, zone or temperament conflicts.
  • Malaysian Trumpet Snail ✅ Compatible
    Easy care · Peaceful · 3 cm · 21–27 °C (70–81 °F)
    Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Neon Tetra ✅ Compatible
    Easy care · Peaceful · 3 cm · 20–26 °C (68–79 °F)
    Both are peaceful, and their water overlaps around 20–24 °C — no size, zone or temperament conflicts.
  • Tail-spot Corydoras ✅ Compatible
    Easy care · Peaceful · 3 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.
  • Pygmy Corydoras ✅ Compatible
    Easy care · Peaceful · 3.2 cm · 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.
  • Glowlight Rasbora ✅ Compatible
    Easy care · Peaceful · 3.5 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.
  • Blue Danio ✅ Compatible
    Easy care · Peaceful · 4 cm · 21–26 °C (70–79 °F)
    Compatible on the things that matter: shared water near 21–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Emperor Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 23–27 °C (73–81 °F)
    Compatible on the things that matter: shared water near 23–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Flame Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 22–28 °C (72–82 °F)
    Both are peaceful, and their water overlaps around 22–24 °C — no size, zone or temperament conflicts.
  • 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; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Golden Dwarf Barb ✅ Compatible
    Easy care · Peaceful · 4 cm · 18–24 °C (64–75 °F)
    Both are peaceful, and their water overlaps around 19–24 °C — no size, zone or temperament conflicts.
  • Phoenix Tetra ✅ Compatible
    Easy care · Peaceful · 4 cm · 23–28 °C (73–82 °F)
    Both are peaceful, and their water overlaps around 23–24 °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, and their water overlaps around 22–24 °C — no size, zone or temperament conflicts.
With caution

Trinidad Guppy tank mates that can work with care

  • African Butterfly Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 8 cm · 22–28 °C (72–82 °F)
    Expect African Butterfly Cichlid to harass Trinidad Guppy at times; give dense cover and watch them at feeding.
  • 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 Trinidad Guppy — plant heavily and break up sight lines.
  • Ash Lipped Apisto ⚠️ With caution
    Hard care · Semi-aggressive · 7 cm · 24–29 °C (75–84 °F)
    Ash Lipped Apisto clearly outsizes Trinidad Guppy and is semi-aggressive; risky unless the tank is big and well-planted.
  • Banded Dwarf Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 7 cm · 24–30 °C (75–86 °F)
    Banded Dwarf Cichlid clearly outsizes Trinidad Guppy and is semi-aggressive; risky unless the tank is big and well-planted.
  • Banded Gourami ⚠️ With caution
    Easy care · Semi-aggressive · 12 cm · 22–28 °C (72–82 °F)
    Banded Gourami clearly outsizes Trinidad Guppy and is semi-aggressive; risky unless the tank is big and well-planted.
  • Bandit Cichlid ⚠️ With caution
    Medium care · Semi-aggressive · 9 cm · 22–26 °C (72–79 °F)
    Bandit Cichlid clearly outsizes Trinidad Guppy 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.

+ 102 more “with caution” pairings — see the interactive checker above.

Avoid

Fish to avoid keeping with a trinidad guppy

  • Wels Catfish ⛔ Avoid
    Hard care · Aggressive · 300 cm · 15–25 °C (59–77 °F)
    Wels Catfish (300 cm) is big enough to swallow the 3 cm Trinidad Guppy whole.
  • Alligator Gar ⛔ Avoid
    Hard care · Aggressive · 250 cm · 24–28 °C (75–82 °F)
    Size gap is too large (250 vs 3 cm): Alligator Gar will treat Trinidad Guppy as food.
  • Redtail Catfish ⛔ Avoid
    Hard care · Aggressive · 120 cm · 24–27 °C (75–81 °F)
    Trinidad Guppy 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)
    Trinidad Guppy 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)
    Trinidad Guppy is bite-sized to a 90 cm predatory clown knifefish — it will be eaten.
  • Koi ⛔ Avoid
    Medium care · Peaceful · 90 cm · 4–28 °C (39–82 °F)
    Size gap is too large (90 vs 3 cm): Koi will treat Trinidad Guppy as food.
  • Spotted Gar ⛔ Avoid
    Hard care · Aggressive · 90 cm · 18–26 °C (64–79 °F)
    Trinidad Guppy 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)
    Wolf Cichlid (72 cm) is big enough to swallow the 3 cm Trinidad Guppy whole.

+ 93 more to avoid — the checker above flags every one.

Interactive tool

Check any fish against a trinidad guppy

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

Tank-mate checker

Will it live with a Trinidad Guppy?

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

  • African Dwarf Frog✅ Compatible
    Peaceful · 4 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.
  • Amapá Tetra✅ Compatible
    Peaceful · 4 cm · Medium care · 24–27 °C (75–81 °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 Amapá Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Assassin Snail✅ Compatible
    Peaceful · 3 cm · Easy care · 22–26 °C (72–79 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Blackwing Hatchetfish✅ Compatible
    Peaceful · 3.5 cm · Medium care · 23–28 °C (73–82 °F)
    • Both are peaceful, and their water overlaps around 23–24 °C — no size, zone or temperament conflicts.
    • Keep Blackwing Hatchetfish 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 19–24 °C, workable temperaments, and no predator-and-prey size gap.
    • Keep Cherry Shrimp in a shoal of 10+ or it gets stressed and nippy.
  • Clown Killifish✅ Compatible
    Peaceful · 3.5 cm · Medium care · 22–26 °C (72–79 °F)
    • Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
    • Keep Clown Killifish in a shoal of 6+ 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 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 22–24 °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 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 23–24 °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 Dwarf Spotted Rasbora in a shoal of 8+ or it gets stressed and nippy.
  • Endler's Livebearer✅ Compatible
    Peaceful · 3 cm · Easy care · 22–28 °C (72–82 °F)
    • Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
    • Keep Endler's Livebearer in a shoal of 6+ or it gets stressed and nippy.
  • Eyespot Rasbora✅ Compatible
    Peaceful · 3.5 cm · Medium care · 20–25 °C (68–77 °F)
    • Both are peaceful, and their water overlaps around 20–24 °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 Eyespot 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)
    • Compatible on the things that matter: shared water near 22–24 °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 Glowlight Danio in a shoal of 8+ or it gets stressed and nippy.
  • Glowlight Rasbora✅ Compatible
    Peaceful · 3.5 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.
    • Both favour the middle of the tank — offer enough cover so they aren't always in each other's space.
    • Keep Glowlight Rasbora 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 19–24 °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 Gold Ring Danio 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, and their water overlaps around 23–24 °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 Lambchop Rasbora in a shoal of 6+ or it gets stressed and nippy.
  • Malaysian Trumpet Snail✅ Compatible
    Peaceful · 3 cm · Easy care · 21–27 °C (70–81 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Neon Tetra✅ Compatible
    Peaceful · 3 cm · Easy care · 20–26 °C (68–79 °F)
    • Both are peaceful, and their water overlaps around 20–24 °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 Tetra in a shoal of 6+ or it gets stressed and nippy.
  • Nerite Snail✅ Compatible
    Peaceful · 2.5 cm · Easy care · 22–28 °C (72–82 °F)
    • Compatible on the things that matter: shared water near 22–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Northern Glowlight Danio✅ Compatible
    Peaceful · 3.5 cm · Medium care · 18–24 °C (64–75 °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 Northern Glowlight Danio in a shoal of 8+ or it gets stressed and nippy.
  • Pea Puffer✅ Compatible
    Semi-aggressive · 2.5 cm · Medium care · 24–28 °C (75–82 °F)
    • Compatible on the things that matter: shared water near 24–24 °C, workable temperaments, and no predator-and-prey size gap.
  • Pygmy Corydoras✅ Compatible
    Peaceful · 3.2 cm · Easy care · 22–26 °C (72–79 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep Pygmy Corydoras 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)
    • 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 Tail-spot Corydoras in a shoal of 8+ or it gets stressed and nippy.
  • Tailspotted Oto✅ Compatible
    Peaceful · 3.5 cm · Medium care · 22–27 °C (72–81 °F)
    • Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
    • Keep Tailspotted Oto in a shoal of 6+ or it gets stressed and nippy.
  • Tiger Shrimp✅ Compatible
    Peaceful · 3 cm · Hard care · 20–25 °C (68–77 °F)
    • Both are peaceful, and their water overlaps around 20–24 °C — no size, zone or temperament conflicts.
    • Keep Tiger Shrimp in a shoal of 6+ or it gets stressed and nippy.
  • Black Darter Tetra⚠️ With caution
    Semi-aggressive · 4 cm · Hard care · 21–28 °C (70–82 °F)
    • Different pH ranges (6.6–7.5 vs 3.5–6.5); doable if you sit in the shared band, but not ideal long-term.
    • Black Darter Tetra is semi-aggressive and may chase or nip the smaller Trinidad Guppy — plant heavily and break up sight lines.
  • Black Ruby Barb⚠️ With caution
    Semi-aggressive · 6 cm · Easy care · 22–26 °C (72–79 °F)
    • Expect Black Ruby Barb to harass Trinidad Guppy at times; give dense cover and watch them at feeding.
    • Trinidad Guppy is small enough to tempt Black Ruby Barb; only risk it in a densely planted setup with hiding spots.
    • Your 75 L tank is below the ~100 L this pairing really wants — crowding raises aggression.
    • Keep Black Ruby Barb in a shoal of 6+ or it gets stressed and nippy.
  • Crimson Red Betta⚠️ With caution
    Peaceful · 3.5 cm · Hard care · 24–29 °C (75–84 °F)
    • pH preferences only just meet (Trinidad Guppy 6.6–7.5 vs Crimson Red Betta 4–6.5) — target the overlap and acclimate slowly.
  • Fire Red Licorice Gourami⚠️ With caution
    Peaceful · 3.5 cm · Hard care · 23–28 °C (73–82 °F)
    • pH preferences only just meet (Trinidad Guppy 6.6–7.5 vs Fire Red Licorice Gourami 4–6.5) — target the overlap and acclimate slowly.
    • One likes softer water and the other harder (5–15 vs 0–4 dGH) — a compromise, not a perfect match.
  • Green Neon Tetra⚠️ With caution
    Peaceful · 2.5 cm · Hard care · 24–28 °C (75–82 °F)
    • Different pH ranges (6.6–7.5 vs 4.5–6.5); doable if you sit in the shared band, but not ideal long-term.
    • Water hardness preferences differ (Trinidad Guppy 5–15 vs Green Neon Tetra 0–4 dGH).
    • Keep Green Neon Tetra in a shoal of 8+ 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 Trinidad Guppy at times; give dense cover and watch them at feeding.
    • Watch for Humpbacked Tetra picking off any trinidad guppy small enough to fit in its mouth.
    • 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.
  • 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.
  • Neon Blue Rasbora⚠️ With caution
    Peaceful · 2.5 cm · Medium care · 23–26 °C (73–79 °F)
    • pH preferences only just meet (Trinidad Guppy 6.6–7.5 vs Neon Blue Rasbora 4–6.5) — target the overlap and acclimate slowly.
    • 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 and Trinidad Guppy are close in size, but the semi-aggressive one tends to dominate — add trinidad guppy in a group to spread the pressure.
    • Keep Rainbow Emperor Tetra 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)
    • Expect Serpae Tetra to harass Trinidad Guppy at times; give dense cover and watch them at feeding.
    • Keep Serpae 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 Trinidad Guppy at times; give dense cover and watch them at feeding.
    • Keep Silvertip 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)
    • pH preferences only just meet (Trinidad Guppy 6.6–7.5 vs Spotfin Betta 4–6.5) — target the overlap and acclimate slowly.
    • Spotfin Betta is semi-aggressive and may chase or nip the smaller Trinidad Guppy — plant heavily and break up sight lines.
    • Trinidad Guppy is small enough to tempt Spotfin Betta; only risk it in a densely planted setup with hiding spots.
  • 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 Trinidad Guppy — plant heavily and break up sight lines.
    • Trinidad Guppy is small enough to tempt Striped Red-Eye Puffer; only risk it in a densely planted setup with hiding spots.
  • Tiger Badis⚠️ With caution
    Semi-aggressive · 4 cm · Medium care · 22–24 °C (72–75 °F)
    • Expect Tiger Badis to harass Trinidad Guppy at times; give dense cover and watch them at feeding.
  • Tucano Tetra⚠️ With caution
    Peaceful · 1.7 cm · Hard care · 23–28 °C (73–82 °F)
    • Different pH ranges (6.6–7.5 vs 4.5–6.5); doable if you sit in the shared band, but not ideal long-term.
    • Keep Tucano Tetra 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)
    • Different pH ranges (6.6–7.5 vs 4–6.5); doable if you sit in the shared band, but not ideal long-term.
    • Water hardness preferences differ (Trinidad Guppy 5–15 vs Wine Red Betta 0–4 dGH).
    • Expect Wine Red Betta to harass Trinidad Guppy at times; give dense cover and watch them at feeding.
    • Wine Red Betta may hunt Trinidad Guppy, fry or shrimplets — safest in a heavily planted tank.
  • Alligator Gar⛔ Not recommended
    Aggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
    • Size gap is too large (250 vs 3 cm): Alligator Gar will treat Trinidad Guppy as food.
    • Expect Alligator Gar to harass Trinidad Guppy 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.
  • Clown Knifefish⛔ Not recommended
    Aggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
    • Trinidad Guppy is bite-sized to a 90 cm predatory clown knifefish — it will be eaten.
    • Clown Knifefish is aggressive and may chase or nip the smaller Trinidad Guppy — plant heavily and break up sight lines.
    • 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)
    • Trinidad Guppy is bite-sized to a 100 cm predatory fire eel — it will be eaten.
    • Expect Fire Eel to harass Trinidad Guppy 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.
  • Koi⛔ Not recommended
    Peaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
    • Size gap is too large (90 vs 3 cm): Koi will treat Trinidad Guppy as food.
    • 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)
    • Trinidad Guppy is bite-sized to a 120 cm predatory redtail catfish — it will be eaten.
    • Expect Redtail Catfish to harass Trinidad Guppy 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.
  • Spotted Gar⛔ Not recommended
    Aggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
    • Trinidad Guppy is bite-sized to a 90 cm predatory spotted gar — it will be eaten.
    • Spotted Gar clearly outsizes Trinidad Guppy 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.
  • 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 3 cm Trinidad Guppy whole.
    • Wels Catfish clearly outsizes Trinidad Guppy and is aggressive; risky unless the tank is big and well-planted.
    • 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)
    • Wolf Cichlid (72 cm) is big enough to swallow the 3 cm Trinidad Guppy whole.
    • Expect Wolf Cichlid to harass Trinidad Guppy at times; give dense cover and watch them at feeding.
    • 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 trinidad guppy 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 trinidad guppy

As a peaceful species, trinidad guppy 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.

Trinidad Guppy grows to about 3 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 19–24 °C (66–75 °F), pH 6.6–7.5 and 5–15 dGH. Fish needing very different conditions — coldwater species, or hard-water lovers against a soft-water fish — rarely thrive side by side.

Trinidad Guppy is a shoaling fish — stock a group of 4+ 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 trinidad guppy live with other fish?

Yes — with the right companions. Our checker finds 129 compatible freshwater species for trinidad guppy. 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 trinidad guppy?

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

What fish should you avoid keeping with a trinidad guppy?

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 trinidad guppy tank mates need?

Start from Trinidad Guppy'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 Trinidad Guppy care guide