Cardinal Tetra and Senegal Bichir Compatibility Overview
Cardinal Tetra and Senegal Bichir are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Cardinal Tetra | Senegal Bichir | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 75โ82ยฐF | โ 75โ82ยฐF |
| pH Range | 4.5โ7.0 | 6.2โ7.8 | โ ๏ธ 6.2โ7.0 (narrow) |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 1.5 in | 19.7 in | โ 13ร difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Cardinal Tetra โ Paracheirodon axelrodi
Brilliant red-and-blue schooling fish from the Rio Negro. Prefers soft, acidic, warm water โ a natural companion for discus.
โ Full Cardinal Tetra care guide
Senegal Bichir โ Polypterus senegalus
The Senegal Bichir is a fascinating freshwater fish known for its eel-like body and bony plates. It is a peaceful community fish that can be kept with a variety of species. These fish are active and require a spacious tank with plenty of swimming room. They are not known to be aggressive and can be a great addition to a beginner's aquarium.
Frequently Asked Questions
Can Cardinal Tetra live with Senegal Bichir?
Generally not recommended. Cardinal Tetra and Senegal Bichir are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Cardinal Tetra and Senegal Bichir together?
A minimum of 100 gallons is recommended for keeping Cardinal Tetra and Senegal Bichir together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Cardinal Tetra and Senegal Bichir?
75โ82ยฐF โ inside Cardinal Tetra's 73โ82ยฐF and Senegal Bichir's 75โ82ยฐF.
Is a Cardinal Tetra aggressive toward a Senegal Bichir?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Cardinal Tetra and Senegal Bichir
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 143 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 220 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 300 gal | Best when keeping larger schools or reducing territorial pressure. |