Lionfish and Moonlight Gourami Compatibility Overview
Lionfish and Moonlight Gourami 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 Moonlight Gourami wants 6.0โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Lionfish | Moonlight Gourami | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 77โ86ยฐF | โ 77โ82ยฐF |
| pH Range | 8.1โ8.4 | 6.0โ7.5 | โ No overlap |
| Temperament | aggressive | peaceful | โ Risk |
| Adult Size | 15.0 in | 5.9 in | โ ๏ธ 2.5ร 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.
Moonlight Gourami โ Trichopodus microlepis
The Moonlight Gourami is a beautiful freshwater fish known for its silvery blue color and red eyes. It is a peaceful community fish suitable for beginners and can thrive in a well-maintained aquarium. These fish are sensitive to water quality and require a spacious tank with plenty of swimming space.
Frequently Asked Questions
Can Lionfish live with Moonlight Gourami?
Generally not recommended. Lionfish and Moonlight Gourami 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 Moonlight Gourami wants 6.0โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Lionfish and Moonlight Gourami together?
A minimum of 100 gallons is recommended for keeping Lionfish and Moonlight Gourami together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Lionfish and Moonlight Gourami?
77โ82ยฐF โ inside Lionfish's 72โ82ยฐF and Moonlight Gourami's 77โ86ยฐF.
Is a Lionfish aggressive toward a Moonlight Gourami?
Lionfish is aggressive and Moonlight Gourami is peaceful. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely.
Related Compatibility Guides
Tank Size for Lionfish and Moonlight Gourami
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 120 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 180 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 220 gal | Best when keeping larger schools or reducing territorial pressure. |