Orinoco Sailfin Pleco Tank Mates

• Banjo Catfish✅ Compatible
  Peaceful · 15 cm · Medium care · 20–26 °C (68–79 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Bearded Corydoras✅ Compatible
  Peaceful · 10 cm · Medium care · 18–24 °C (64–75 °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 bottom of the tank — offer enough cover so they aren't always in each other's space.
  • Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
• Bristlenose Pleco✅ Compatible
  Peaceful · 12 cm · Easy care · 23–30 °C (73–86 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Burmese Loach✅ Compatible
  Peaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Clown Loach✅ Compatible
  Peaceful · 30 cm · Medium care · 25–30 °C (77–86 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Clown Pleco✅ Compatible
  Peaceful · 9 cm · Medium care · 24–28 °C (75–82 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Common Pleco✅ Compatible
  Peaceful · 45 cm · Medium 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 bottom of the tank — offer enough cover so they aren't always in each other's space.
• Elephant-nose Knifefish✅ Compatible
  Peaceful · 35 cm · Hard care · 24–29 °C (75–84 °F)
  • Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Giant Kuhli Loach✅ Compatible
  Peaceful · 12 cm · Easy care · 24–30 °C (75–86 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Kuhli Loach✅ Compatible
  Peaceful · 10 cm · Easy care · 24–30 °C (75–86 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Leopard Frog Pleco✅ Compatible
  Peaceful · 9 cm · Medium care · 25–30 °C (77–86 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 25–28 °C — no size, zone or temperament conflicts.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Marbled Hoplo✅ Compatible
  Peaceful · 14 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 bottom of the tank — offer enough cover so they aren't always in each other's space.
• Medusa Pleco✅ Compatible
  Peaceful · 12 cm · Medium care · 26–30 °C (79–86 °F)
  • Compatible on the things that matter: shared water near 26–28 °C, workable temperaments, and no predator-and-prey size gap.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Porthole Catfish✅ Compatible
  Peaceful · 10 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 bottom of the tank — offer enough cover so they aren't always in each other's space.
• Rubber Lip Pleco✅ Compatible
  Peaceful · 12 cm · Easy 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.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Sailfin Pleco✅ Compatible
  Peaceful · 50 cm · Medium care · 22–28 °C (72–82 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–28 °C — no size, zone or temperament conflicts.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Snowball Pleco✅ Compatible
  Peaceful · 16 cm · Medium care · 24–30 °C (75–86 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Spotted Rubbernose Pleco✅ Compatible
  Peaceful · 12 cm · Medium care · 20–26 °C (68–79 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Spotted Talking Catfish✅ Compatible
  Peaceful · 15 cm · Easy 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.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Striped Eel Loach✅ Compatible
  Peaceful · 12 cm · Medium care · 24–28 °C (75–82 °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 bottom of the tank — offer enough cover so they aren't always in each other's space.
• Upside-down Catfish✅ Compatible
  Peaceful · 10 cm · Easy care · 22–26 °C (72–79 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 22–26 °C — no size, zone or temperament conflicts.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Weather Loach✅ Compatible
  Peaceful · 25 cm · Easy care · 5–24 °C (41–75 °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 bottom of the tank — offer enough cover so they aren't always in each other's space.
• Yellow-spotted Pleco✅ Compatible
  Peaceful · 35 cm · Medium care · 24–27 °C (75–81 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Zebra Pleco✅ Compatible
  Peaceful · 10 cm · Hard care · 26–30 °C (79–86 °F)
  • Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
  • Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
• Bichir⚠️ With caution
  Semi-aggressive · 45 cm · Medium care · 24–28 °C (75–82 °F)
  • Orinoco Sailfin Pleco and Bichir can both be territorial; doable with space and dense planting, but watch for chasing.
• Black Doras Catfish⚠️ With caution
  Peaceful · 60 cm · Hard care · 22–28 °C (72–82 °F)
  • Your 450 L tank is below the ~500 L this pairing really wants — crowding raises aggression.
• Black Ghost Knifefish⚠️ With caution
  Semi-aggressive · 45 cm · Hard care · 24–28 °C (75–82 °F)
  • Orinoco Sailfin Pleco and Black Ghost Knifefish can both be territorial; doable with space and dense planting, but watch for chasing.
• Butter Catfish⚠️ With caution
  Semi-aggressive · 45 cm · Medium care · 24–28 °C (75–82 °F)
  • Orinoco Sailfin Pleco and Butter Catfish can both be territorial; doable with space and dense planting, but watch for chasing.
  • Your 450 L tank is below the ~680 L this pairing really wants — crowding raises aggression.
• Giant Gourami⚠️ With caution
  Semi-aggressive · 70 cm · Medium care · 22–28 °C (72–82 °F)
  • Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
  • Your 450 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
• Golden Sailfin Pleco⚠️ With caution
  Semi-aggressive · 45 cm · Medium care · 22–28 °C (72–82 °F)
  • Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
• Goldfish⚠️ With caution
  Peaceful · 30 cm · Medium care · 18–22 °C (64–72 °F)
  • Orinoco Sailfin Pleco is semi-aggressive and may chase or nip the smaller Goldfish — plant heavily and break up sight lines.
• Imperial Flower Loach⚠️ With caution
  Semi-aggressive · 50 cm · Hard care · 15–22 °C (59–72 °F)
  • Orinoco Sailfin Pleco and Imperial Flower Loach can both be territorial; doable with space and dense planting, but watch for chasing.
  • Your 450 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
• Kissing Gourami⚠️ With caution
  Semi-aggressive · 30 cm · Medium care · 22–28 °C (72–82 °F)
  • Orinoco Sailfin Pleco and Kissing Gourami can both be territorial; doable with space and dense planting, but watch for chasing.
• Leopard Cactus Pleco⚠️ With caution
  Semi-aggressive · 30 cm · Hard care · 24–30 °C (75–86 °F)
  • Orinoco Sailfin Pleco and Leopard Cactus Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
• Lima Shovelnose Catfish⚠️ With caution
  Semi-aggressive · 50 cm · Hard care · 23–30 °C (73–86 °F)
  • Orinoco Sailfin Pleco and Lima Shovelnose Catfish can both be territorial; doable with space and dense planting, but watch for chasing.
  • Your 450 L tank is below the ~760 L this pairing really wants — crowding raises aggression.
• Lyre Tail Pleco⚠️ With caution
  Semi-aggressive · 63 cm · Hard care · 21–27 °C (70–81 °F)
  • Orinoco Sailfin Pleco and Lyre Tail Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
  • Your 450 L tank is below the ~1500 L this pairing really wants — crowding raises aggression.
• Nile Bichir⚠️ With caution
  Semi-aggressive · 70 cm · Medium care · 25–28 °C (77–82 °F)
  • Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
• Royal Pleco⚠️ With caution
  Semi-aggressive · 43 cm · Medium care · 23–28 °C (73–82 °F)
  • Orinoco Sailfin Pleco and Royal Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
• Spotted Shovelnose Catfish⚠️ With caution
  Semi-aggressive · 55 cm · Hard care · 22–28 °C (72–82 °F)
  • Orinoco Sailfin Pleco and Spotted Shovelnose Catfish can both be territorial; doable with space and dense planting, but watch for chasing.
  • Your 450 L tank is below the ~570 L this pairing really wants — crowding raises aggression.
• True Parrot Cichlid⚠️ With caution
  Semi-aggressive · 33 cm · Hard care · 23–28 °C (73–82 °F)
  • Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
• Alligator Gar⛔ Not recommended
  Aggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
  • Orinoco Sailfin Pleco and Alligator Gar are both territorial and at least one is outright aggressive — expect serious fighting.
  • Alligator Gar may bully the smaller Orinoco Sailfin Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Your 450 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: Orinoco Sailfin Pleco and Clown Knifefish will hold territory and clash.
  • Your 450 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
• Mbu Puffer⛔ Not recommended
  Aggressive · 67 cm · Hard care · 24–28 °C (75–82 °F)
  • Two assertive fish, one genuinely aggressive: Orinoco Sailfin Pleco and Mbu Puffer will hold territory and clash.
  • Your 450 L tank is below the ~757 L this pairing really wants — crowding raises aggression.
• Ocellaris Peacock Bass⛔ Not recommended
  Aggressive · 70 cm · Hard care · 24–30 °C (75–86 °F)
  • Two assertive fish, one genuinely aggressive: Orinoco Sailfin Pleco and Ocellaris Peacock Bass will hold territory and clash.
  • Your 450 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
• Redtail Catfish⛔ Not recommended
  Aggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
  • Orinoco Sailfin Pleco and Redtail Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Your 450 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)
  • Orinoco Sailfin Pleco and Spotted Gar are both territorial and at least one is outright aggressive — expect serious fighting.
  • Your 450 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)
  • Orinoco Sailfin Pleco and Wels Catfish are both territorial and at least one is outright aggressive — expect serious fighting.
  • Wels Catfish may bully the smaller Orinoco Sailfin Pleco, though its armour makes it a hard meal — give it caves and driftwood to retreat into.
  • Your 450 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: Orinoco Sailfin Pleco and Wolf Cichlid will hold territory and clash.
  • Your 450 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.