Clown Knifefish and Keyhole Cichlid Compatibility Overview
Clown Knifefish and Keyhole Cichlid are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Clown Knifefish is aggressive and Keyhole Cichlid is peaceful. 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 | Clown Knifefish | Keyhole Cichlid | Verdict |
|---|---|---|---|
| Temperature | 68โ82ยฐF | 70โ82ยฐF | โ 70โ82ยฐF |
| pH Range | 6.0โ8.0 | 4.0โ7.5 | โ 6.0โ7.5 |
| Temperament | aggressive | peaceful | โ Risk |
| Adult Size | 39.4 in | 4.3 in | โ 9ร difference |
| Min. Group | 1+ | 2+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
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.
โ Full Clown Knifefish care guide
Keyhole Cichlid โ Cleithracara maronii
The Keyhole Cichlid is a popular choice for beginners due to its relatively easy care and peaceful temperament. These fish are known for their distinct keyhole marking and vibrant coloration. They do well in a community tank with other peaceful species, but should be provided with plenty of hiding spots to feel secure.
Frequently Asked Questions
Can Clown Knifefish live with Keyhole Cichlid?
Generally not recommended. Clown Knifefish and Keyhole Cichlid are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Clown Knifefish is aggressive and Keyhole Cichlid is peaceful. 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 Clown Knifefish and Keyhole Cichlid together?
A minimum of 100 gallons is recommended for keeping Clown Knifefish and Keyhole Cichlid together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Clown Knifefish and Keyhole Cichlid?
70โ82ยฐF โ inside Clown Knifefish's 68โ82ยฐF and Keyhole Cichlid's 70โ82ยฐF.
Is a Clown Knifefish aggressive toward a Keyhole Cichlid?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Clown Knifefish and Keyhole Cichlid
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. |