Firefish Goby and Harlequin Rasbora Compatibility Overview
Firefish Goby and Harlequin Rasbora 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. Their pH ranges do not meet: Firefish Goby wants 8.1โ8.4 and Harlequin Rasbora wants 5.5โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Firefish Goby | Harlequin Rasbora | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 72โ81ยฐF | โ 72โ81ยฐF |
| pH Range | 8.1โ8.4 | 5.5โ7.5 | โ No overlap |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 3.0 in | 1.75 in | โ Similar |
| Min. Group | 1+ | 8+ | See below |
| Min. Tank Size | 20 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Firefish Goby โ Nemateleotris magnifica
The Firefish Goby is a popular choice for saltwater aquariums due to its vibrant colors and peaceful nature. These goby fish thrive in well-maintained tanks with plenty of live rock for them to explore. They are best kept in pairs or small groups and can be a great addition to a community tank with compatible species.
โ Full Firefish Goby care guide
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 Firefish Goby live with Harlequin Rasbora?
Generally not recommended. Firefish Goby and Harlequin Rasbora 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. Their pH ranges do not meet: Firefish Goby wants 8.1โ8.4 and Harlequin Rasbora wants 5.5โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Firefish Goby and Harlequin Rasbora together?
A minimum of 20 gallons is recommended for keeping Firefish Goby and Harlequin Rasbora together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Firefish Goby and Harlequin Rasbora?
72โ81ยฐF โ inside Firefish Goby's 72โ82ยฐF and Harlequin Rasbora's 72โ81ยฐF.
Is a Firefish Goby aggressive toward a Harlequin Rasbora?
Firefish Goby is peaceful and Harlequin Rasbora is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Firefish Goby 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 | 20 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 29 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 55 gal | Best when keeping larger schools or reducing territorial pressure. |