Keyhole Cichlid and Rainbow Shark Compatibility Overview
Keyhole Cichlid and Rainbow Shark can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Keyhole Cichlid is peaceful and Rainbow Shark is semi, so give them room and cover rather than assuming they will ignore each other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Keyhole Cichlid | Rainbow Shark | Verdict |
|---|---|---|---|
| Temperature | 70โ82ยฐF | 72โ79ยฐF | โ 72โ79ยฐF |
| pH Range | 4.0โ7.5 | 6.5โ7.5 | โ 6.5โ7.5 |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 4.3 in | 6 in | โ Similar |
| Min. Group | 2+ | 1+ | See below |
| Min. Tank Size | 55 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
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.
โ Full Keyhole Cichlid care guide
Rainbow Shark โ Epalzeorhynchos frenatum
Active bottom dweller that becomes territorial at maturity. One per tank; avoid other shark-like or bottom-dwelling species.
Frequently Asked Questions
Can Keyhole Cichlid live with Rainbow Shark?
Yes, in a well-planned setup. Keyhole Cichlid and Rainbow Shark can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Keyhole Cichlid is peaceful and Rainbow Shark is semi, so give them room and cover rather than assuming they will ignore each other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Keyhole Cichlid and Rainbow Shark together?
A minimum of 55 gallons is recommended for keeping Keyhole Cichlid and Rainbow Shark together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Keyhole Cichlid and Rainbow Shark?
72โ79ยฐF โ inside Keyhole Cichlid's 70โ82ยฐF and Rainbow Shark's 72โ79ยฐF.
Is a Keyhole Cichlid aggressive toward a Rainbow Shark?
Keyhole Cichlid is peaceful and Rainbow Shark is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Keyhole Cichlid and Rainbow Shark
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 55 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 75 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 100 gal | Best when keeping larger schools or reducing territorial pressure. |