Angelfish and Harlequin Rasbora Compatibility Overview
Angelfish and Harlequin Rasbora 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 | Angelfish | Harlequin Rasbora | Verdict |
|---|---|---|---|
| Temperature | 74โ84ยฐF | 72โ81ยฐF | โ 74โ81ยฐF |
| pH Range | 6.0โ7.5 | 5.5โ7.5 | โ 6.0โ7.5 |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 6 in | 1.75 in | โ ๏ธ 3.4ร difference |
| Min. Group | 1+ | 8+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Angelfish โ Pterophyllum scalare
Elegant South American cichlids with long flowing fins. Generally peaceful but territorial when breeding and will eat very small fish.
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.
Frequently Asked Questions
Can Angelfish live with Harlequin Rasbora?
Generally not recommended. Angelfish and Harlequin Rasbora 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 Angelfish and Harlequin Rasbora together?
A minimum of 75 gallons is recommended for keeping Angelfish and Harlequin Rasbora together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Angelfish and Harlequin Rasbora?
74โ81ยฐF โ inside Angelfish's 74โ84ยฐF and Harlequin Rasbora's 72โ81ยฐF.
Is a Angelfish aggressive toward a Harlequin Rasbora?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Angelfish and Harlequin Rasbora
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 75 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 125 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 150 gal | Best when keeping larger schools or reducing territorial pressure. |