Giant Danio and Oscar Compatibility Overview
Giant Danio and Oscar are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Giant Danio is semi and Oscar is aggressive. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Giant Danio | Oscar | Verdict |
|---|---|---|---|
| Temperature | 72โ81ยฐF | 74โ81ยฐF | โ 74โ81ยฐF |
| pH Range | 6.5โ7.5 | 6.0โ8.0 | โ 6.5โ7.5 |
| Temperament | semi | aggressive | โ Risk |
| Adult Size | 4.0 in | 14 in | โ ๏ธ 3.5ร difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Giant Danio โ Devario aequipinnatus
The Giant Danio is a vibrant and peaceful addition to the freshwater aquarium. Known for its striking red and blue colors, it is a popular choice for beginners and experienced aquarists alike. These fish are relatively easy to care for and can thrive in a well-maintained tank.
โ Full Giant Danio care guide
Oscar โ Astronotus ocellatus
Intelligent but aggressive cichlids that will eat any fish small enough to fit in their mouth. Require large tanks (75+ gallons) and robust tank mates.
Frequently Asked Questions
Can Giant Danio live with Oscar?
Generally not recommended. Giant Danio and Oscar are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Giant Danio is semi and Oscar is aggressive. Expect chasing and fin damage unless the tank is oversized, heavily planted, and watched closely. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Giant Danio and Oscar together?
A minimum of 100 gallons is recommended for keeping Giant Danio and Oscar together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Giant Danio and Oscar?
74โ81ยฐF โ inside Giant Danio's 72โ81ยฐF and Oscar's 74โ81ยฐF.
Is a Giant Danio aggressive toward a Oscar?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Giant Danio and Oscar
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 100 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 150 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. |