Red Eye Tetra and Watchman Goby Compatibility Overview
Red Eye Tetra and Watchman Goby 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: Red Eye Tetra wants 6.0โ8.0 and Watchman Goby wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Red Eye Tetra | Watchman Goby | Verdict |
|---|---|---|---|
| Temperature | 72โ79ยฐF | 72โ82ยฐF | โ 72โ79ยฐF |
| pH Range | 6.0โ8.0 | 8.1โ8.4 | โ No overlap |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 2.8 in | 4.0 in | โ Similar |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 55 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Red Eye Tetra โ Moenkhausia sanctaefilomenae
The Red Eye Tetra is a popular freshwater fish known for its vibrant red eyes and sleek, silver body. They are generally peaceful and can be kept in a community tank with other non-aggressive species. Their moderate activity level makes them suitable for a variety of aquarium setups. With proper care, they can live up to 5 years.
โ Full Red Eye Tetra care guide
Watchman Goby โ Cryptocentrus cinctus
The Watchman Goby is a peaceful and colorful addition to the marine aquarium. It is known for its slender body and distinctive yellow and dark spot pattern. These gobies are often found in pairs or small groups and require a well-maintained saltwater tank with plenty of hiding spots. With proper care, they can thrive for several years.
Frequently Asked Questions
Can Red Eye Tetra live with Watchman Goby?
Generally not recommended. Red Eye Tetra and Watchman Goby 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: Red Eye Tetra wants 6.0โ8.0 and Watchman Goby wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Red Eye Tetra and Watchman Goby together?
A minimum of 55 gallons is recommended for keeping Red Eye Tetra and Watchman Goby together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Red Eye Tetra and Watchman Goby?
72โ79ยฐF โ inside Red Eye Tetra's 72โ79ยฐF and Watchman Goby's 72โ82ยฐF.
Is a Red Eye Tetra aggressive toward a Watchman Goby?
Red Eye Tetra is semi and Watchman Goby is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Red Eye Tetra and Watchman Goby
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 55 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 75 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 125 gal | Best when keeping larger schools or reducing territorial pressure. |