Angelfish and Clown Knifefish Compatibility Overview
Angelfish and Clown Knifefish are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Angelfish is semi and Clown Knifefish is aggressive. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Angelfish | Clown Knifefish | Verdict |
|---|---|---|---|
| Temperature | 74โ84ยฐF | 68โ82ยฐF | โ 74โ82ยฐF |
| pH Range | 6.0โ7.5 | 6.0โ8.0 | โ 6.0โ7.5 |
| Temperament | semi | aggressive | โ Risk |
| Adult Size | 6 in | 39.4 in | โ 7ร difference |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 100 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.
Clown Knifefish โ Chitala ornata
The Clown Knifefish is a unique and visually striking species known for its slender body and distinctive coloration. It is a solitary fish that requires a spacious tank to thrive. With a moderate activity level and low aggression, it can be a suitable addition to a community tank with similarly peaceful species.
Frequently Asked Questions
Can Angelfish live with Clown Knifefish?
Generally not recommended. Angelfish and Clown Knifefish are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Angelfish is semi and Clown Knifefish is aggressive. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Angelfish and Clown Knifefish together?
A minimum of 100 gallons is recommended for keeping Angelfish and Clown Knifefish together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Angelfish and Clown Knifefish?
74โ82ยฐF โ inside Angelfish's 74โ84ยฐF and Clown Knifefish's 68โ82ยฐF.
Is a Angelfish aggressive toward a Clown Knifefish?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Angelfish and Clown Knifefish
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 300 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 450 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 550 gal | Best when keeping larger schools or reducing territorial pressure. |