Can plecos live with oscars?
❌ Not recommended No, it's not recommended
- ❌ Not recommended An adult oscar (up to 35 cm) is big enough to eat bristlenose pleco (13 cm).
- ❌ Not recommended Oscar is aggressive and will bully peaceful bristlenose pleco.
- ⚠️ Caution Oscar defends a territory near the bottom (especially when breeding) and may chase bristlenose pleco.
| Bristlenose pleco | Oscar | |
| Temperature | 70–79 °F (21–26 °C) | 68–82 °F (20–28 °C) |
| pH | 5.5–7.5 | 6–7.5 |
| Adult size | 5.1 in (13 cm) | 13.8 in (35 cm) |
| Temperament | Peaceful | Aggressive |
| Swims in | Bottom | All levels |
| Minimum tank | 20 gal | 180 gal |
Shared temperature: 70–79 °F (21–26 °C) · Shared pH: 6–7.5
If you already have both
- Separate them as soon as possible, or rehome one of them. Use a divider in the meantime.
See all bristlenose pleco tank mates and oscar tank mates, or add more species in the checker.
FAQ
Can plecos live with oscars?
No, it's not recommended. An adult oscar (up to 35 cm) is big enough to eat bristlenose pleco (13 cm). Oscar is aggressive and will bully peaceful bristlenose pleco.
What temperature for plecos and oscars?
Bristlenose pleco: 70–79 °F (21–26 °C). Oscar: 68–82 °F (20–28 °C). Shared range: 70–79 °F (21–26 °C).
What size tank for plecos and oscars?
At least 180 US gallons, more as you add fish.
Note: Compatibility depends on individual temperament, tank size, decor and how fish are introduced. Our verdicts use conservative rules applied to published care data (see methodology). They are guidance, not a guarantee. Quarantine new fish and watch for chasing, torn fins or hiding.