Piranha
Piranha is a aggressive freshwater fish that needs a tank of at least 100 gallons (379 L), water at 75-82°F (24-28°C) and a pH of 6-7.5.
Also searched as: piranha, red belly piranha, pygocentrus nattereri
Quick facts
Schooling predator. Keep 4+ or single. Illegal in some states.
| Minimum tank | 100 gallons (379 L) |
|---|---|
| Temperature | 75-82°F (24-28°C) |
| pH | 6-7.5 |
| Temperament | Aggressive |
| Swim level | Middle |
| Group size | 4 or more together |
| Tank type | Freshwater |
Good tank mates
No other species in the database passes the temperament and water checks for Piranha. Check a specific pairing with the stocking guide at the end of this page.
Avoid with
Pairings that fail the temperament, water-overlap or known-conflict checks.
- Discusmin tank 50 gal
Aggressive species will harass or eat peaceful fish; temperature overlap 82°F is too narrow.
- Goldfishmin tank 20 gal
Aggressive species will harass or eat peaceful fish; no temperature overlap (75-82°F vs 65-72°F).
- Frontosamin tank 125 gal
High risk of conflict between aggressive species; no pH overlap (6-7.5 vs 8-9).
- Tropheusmin tank 75 gal
Aggressive species should not be mixed; no pH overlap (6-7.5 vs 8-9).
- African Cichlids (Mbuna)min tank 55 gal
Aggressive species should not be mixed; no pH overlap (6-7.5 vs 7.8-8.6).
Check your own tank
These lists compare one species against the rest of the database. Your stock list, tank size and bioload change the answer, so log your own tank.
Start a tank logStocking guide
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