Firefish Goby and Threadfin Rainbowfish Compatibility Overview
Firefish Goby and Threadfin Rainbowfish 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 Threadfin Rainbowfish wants 5.0โ8.0. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Firefish Goby | Threadfin Rainbowfish | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 72โ86ยฐF | โ 72โ82ยฐF |
| pH Range | 8.1โ8.4 | 5.0โ8.0 | โ No overlap |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 3.0 in | 1.6 in | โ Similar |
| Min. Group | 1+ | 6+ | 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
Threadfin Rainbowfish โ Iriatherina werneri
The Threadfin Rainbowfish is a popular choice for freshwater aquariums due to its vibrant colors and peaceful nature. It requires a well-maintained tank with plenty of swimming space and a moderate water flow. These fish are not known to be aggressive and can be kept in community tanks with other peaceful species.
Frequently Asked Questions
Can Firefish Goby live with Threadfin Rainbowfish?
Generally not recommended. Firefish Goby and Threadfin Rainbowfish 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 Threadfin Rainbowfish wants 5.0โ8.0. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Firefish Goby and Threadfin Rainbowfish together?
A minimum of 20 gallons is recommended for keeping Firefish Goby and Threadfin Rainbowfish together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Firefish Goby and Threadfin Rainbowfish?
72โ82ยฐF โ inside Firefish Goby's 72โ82ยฐF and Threadfin Rainbowfish's 72โ86ยฐF.
Is a Firefish Goby aggressive toward a Threadfin Rainbowfish?
Firefish Goby is peaceful and Threadfin Rainbowfish is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Firefish Goby and Threadfin Rainbowfish
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. |