Pajama Cardinalfish and Severum Cichlid Compatibility Overview
Pajama Cardinalfish and Severum Cichlid are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Pajama Cardinalfish | Severum Cichlid | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 72โ84ยฐF | โ 72โ82ยฐF |
| pH Range | 8.1โ8.4 | 5.5โ7.0 | โ No overlap |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 3.5 in | 11.8 in | โ ๏ธ 3.4ร difference |
| Min. Group | 3+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Pajama Cardinalfish โ Sphaeramia nematoptera
The Pajama Cardinalfish is a popular, beginner-friendly fish that can add a splash of color to your aquarium. They are generally peaceful and can be kept in a community tank. With moderate activity levels and a preference for undisturbed swimming spaces, they require a well-maintained water quality and a spacious tank.
โ Full Pajama Cardinalfish care guide
Severum Cichlid โ Heros efasciatus
The Severum Cichlid, known for its vibrant colors and peaceful nature, is a popular choice for freshwater aquariums. They have a lifespan of around 5 years and require a minimum tank size of 80 liters. These fish are not schooling fish but are known to be gentle and compatible with a variety of tank mates.
Frequently Asked Questions
Can Pajama Cardinalfish live with Severum Cichlid?
Generally not recommended. Pajama Cardinalfish and Severum Cichlid are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. 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 Pajama Cardinalfish and Severum Cichlid together?
A minimum of 100 gallons is recommended for keeping Pajama Cardinalfish and Severum Cichlid together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Pajama Cardinalfish and Severum Cichlid?
72โ82ยฐF โ inside Pajama Cardinalfish's 72โ82ยฐF and Severum Cichlid's 72โ84ยฐF.
Is a Pajama Cardinalfish aggressive toward a Severum Cichlid?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Pajama Cardinalfish and Severum Cichlid
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 100 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 150 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 180 gal | Best when keeping larger schools or reducing territorial pressure. |