Firefish Goby and Rainbow Shark Compatibility Overview
Firefish Goby and Rainbow Shark 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 Rainbow Shark wants 6.5โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Firefish Goby | Rainbow Shark | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 72โ79ยฐF | โ 72โ79ยฐF |
| pH Range | 8.1โ8.4 | 6.5โ7.5 | โ No overlap |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 3.0 in | 6 in | โ ๏ธ 2.0ร difference |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 55 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
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 Firefish Goby live with Rainbow Shark?
Generally not recommended. Firefish Goby and Rainbow Shark 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 Rainbow Shark wants 6.5โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Firefish Goby and Rainbow Shark together?
A minimum of 55 gallons is recommended for keeping Firefish Goby and Rainbow Shark together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Firefish Goby and Rainbow Shark?
72โ79ยฐF โ inside Firefish Goby's 72โ82ยฐF and Rainbow Shark's 72โ79ยฐF.
Is a Firefish Goby aggressive toward a Rainbow Shark?
Firefish Goby is peaceful and Rainbow Shark is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Firefish Goby 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. |