Lionfish and Silver Arowana Compatibility Overview
Lionfish and Silver Arowana 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: Lionfish wants 8.1โ8.4 and Silver Arowana wants 5.0โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Lionfish | Silver Arowana | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 68โ86ยฐF | โ 72โ82ยฐF |
| pH Range | 8.1โ8.4 | 5.0โ7.5 | โ No overlap |
| Temperament | aggressive | aggressive | โ Risk |
| Adult Size | 15.0 in | 31.5 in | โ ๏ธ 2.1ร difference |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Lionfish โ Pterois volitans
Lionfish are popular saltwater aquarium fish known for their striking colors and intimidating spines. These fish require a large tank and careful attention to water parameters. Aggressive by nature, they can be harmful to smaller fish and invertebrates.
Silver Arowana โ Osteoglossum bicirrhosum
The Silver Arowana is a majestic and unique fish known for its striking appearance and size. It is a large, predatory fish that requires a spacious tank and specific water conditions. While not a community fish, it can be kept with compatible, larger species. They are sensitive to stress and require careful water quality management.
Frequently Asked Questions
Can Lionfish live with Silver Arowana?
Generally not recommended. Lionfish and Silver Arowana 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: Lionfish wants 8.1โ8.4 and Silver Arowana wants 5.0โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Lionfish and Silver Arowana together?
A minimum of 100 gallons is recommended for keeping Lionfish and Silver Arowana together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Lionfish and Silver Arowana?
72โ82ยฐF โ inside Lionfish's 72โ82ยฐF and Silver Arowana's 68โ86ยฐF.
Is a Lionfish aggressive toward a Silver Arowana?
Lionfish and Silver Arowana are both aggressive; housing them together invites sustained fighting rather than an occasional squabble.
Related Compatibility Guides
Tank Size for Lionfish and Silver Arowana
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 250 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 350 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 450 gal | Best when keeping larger schools or reducing territorial pressure. |