Corydoras and Goldfish Compatibility Overview
Corydoras Catfish and Goldfish are generally not recommended to be housed together. Goldfish is a cool-water fish and Corydoras Catfish is tropical, so the usable temperature range decides this pairing. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Corydoras Catfish | Goldfish | Verdict |
|---|---|---|---|
| Temperature | 70โ79ยฐF | 50โ74ยฐF | โ 70โ74ยฐF |
| pH Range | 6.0โ8.0 | 6.5โ8.0 | โ 6.5โ8.0 |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 2.5 in | 12 in | โ 5ร difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Corydoras Catfish โ Corydoras spp.
Armoured bottom-dwelling catfish that are peaceful with all non-aggressive species. Need fine sand substrate to protect delicate barbels.
โ Full Corydoras Catfish care guide
Goldfish โ Carassius auratus
Classic pond and aquarium fish that prefer cool water. Heavy waste producers that require robust filtration. Will eat small fish and shrimp.
Frequently Asked Questions
Can Corydoras Catfish live with Goldfish?
Generally not recommended. Corydoras Catfish and Goldfish are generally not recommended to be housed together. Goldfish is a cool-water fish and Corydoras Catfish is tropical, so the usable temperature range decides this pairing. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Corydoras Catfish and Goldfish together?
A minimum of 100 gallons is recommended for keeping Corydoras Catfish and Goldfish together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Corydoras Catfish and Goldfish?
70โ74ยฐF โ inside Corydoras Catfish's 70โ79ยฐF and Goldfish's 50โ74ยฐF.
Is a Corydoras Catfish aggressive toward a Goldfish?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Corydoras and Goldfish
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. |