Mystery Snail and Oscar Compatibility Overview
Mystery Snail and Oscar are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Mystery Snail is peaceful 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 | Mystery Snail | Oscar | Verdict |
|---|---|---|---|
| Temperature | 68โ80ยฐF | 74โ81ยฐF | โ 74โ80ยฐF |
| pH Range | 7.0โ8.0 | 6.0โ8.0 | โ 7.0โ8.0 |
| Temperament | peaceful | aggressive | โ Risk |
| Adult Size | 2 in | 14 in | โ 7ร difference |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Mystery Snail โ Pomacea bridgesii
Large, peaceful aquarium snails that graze on algae and detritus. Shell provides some protection but can be harassed by certain fish.
โ Full Mystery Snail 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 Mystery Snail live with Oscar?
Generally not recommended. Mystery Snail and Oscar are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Mystery Snail is peaceful 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 Mystery Snail and Oscar together?
A minimum of 100 gallons is recommended for keeping Mystery Snail and Oscar together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Mystery Snail and Oscar?
74โ80ยฐF โ inside Mystery Snail's 68โ80ยฐF and Oscar's 74โ81ยฐF.
Is a Mystery Snail aggressive toward a Oscar?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Mystery Snail 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 | 180 gal | Best when keeping larger schools or reducing territorial pressure. |