Can Molly Live With Firefish Goby?
❌Not Compatible
Cannot coexist — Molly is freshwater, Firefish Goby is saltwater.
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Parameter Comparison
| Parameter | Molly | Firefish Goby | Overlap |
|---|---|---|---|
| Temperature | 72–82°F | 75–80°F | 75–80°F ✓ |
| pH Range | 7–8.5 | 8.1–8.4 | 8.1–8.4 ✓ |
| Temperament | peaceful | peaceful | Both peaceful ✓ |
| Max Size | 4.5" | 3" | Similar ✓ |
| Min Tank Size | 20 gal | 20 gal | 20 gal minimum together |
| Diet | Omnivore | Carnivore | — |
| Care Level | beginner | beginner | — |
Species Profiles
Molly
Poecilia sphenops
beginnerpeaceful20+ gal
Mollies are versatile livebearers that come in many varieties including black, dalmatian, balloon, and sailfin. They prefer hard, alkaline water and can even tolerate brackish conditions. They are active, personable fish that breed easily.
Full care guide →Firefish Goby
Nemateleotris magnifica
beginnerpeaceful20+ gal
Firefish gobies are graceful, flame-colored marine fish that hover above the rock work like tiny, living flames. Their elongated dorsal spine and gradient from white to red-orange makes them visually striking. They are peaceful, hardy, and reef-safe, making them ideal for beginner marine aquariums. They require a tight-fitting lid as they are notorious jumpers.
Full care guide →Other Compatible Tank Mates
For Molly:
For Firefish Goby:
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