Harlequin Rasbora and Senegal Bichir Compatibility Overview
Harlequin Rasbora and Senegal Bichir are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Harlequin Rasbora | Senegal Bichir | Verdict |
|---|---|---|---|
| Temperature | 72โ81ยฐF | 75โ82ยฐF | โ 75โ81ยฐF |
| pH Range | 5.5โ7.5 | 6.2โ7.8 | โ 6.2โ7.5 |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 1.75 in | 19.7 in | โ 11ร difference |
| Min. Group | 8+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Harlequin Rasbora โ Trigonostigma heteromorpha
Active mid-level schooling fish with a distinctive black triangular patch. One of the best all-around community tank fish.
โ Full Harlequin Rasbora 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 Harlequin Rasbora live with Senegal Bichir?
Generally not recommended. Harlequin Rasbora and Senegal Bichir are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Harlequin Rasbora and Senegal Bichir together?
A minimum of 100 gallons is recommended for keeping Harlequin Rasbora and Senegal Bichir together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Harlequin Rasbora and Senegal Bichir?
75โ81ยฐF โ inside Harlequin Rasbora's 72โ81ยฐF and Senegal Bichir's 75โ82ยฐF.
Is a Harlequin Rasbora aggressive toward a Senegal Bichir?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Harlequin Rasbora 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. |