Silver Moony
Monodactylus argenteus
Water Parameters
About
The Silver Mono is a high‑bodied, laterally compressed fish with a bright silver sheen and yellowish fins. Although it is often sold as a freshwater species, adults actually require brackish to marine water. It is an elegant, active schooling fish that needs a spacious aquarium.
Behavior & Temperament
Active, sociable fish that forms schools. Peaceful with similarly sized fish. When young it tolerates freshwater, but adults require brackish to marine water.
Feeding
Omnivore. Accepts flakes, pellets, brine shrimp, mysis, vegetables (spinach, algae) and varied frozen foods. Varied diet is important.
Breeding
Oviparous. Does not reproduce in home aquariums. In the wild, it spawns in coastal marine waters.
Care Notes
IMPORTANT: Juveniles tolerate fresh water temporarily, but ADULTS need brackish (1.010‑1.020 sg) to marine water. Large aquarium with swimming space. Gradual transition to higher salinity as they grow.
Compatibility
Compatible with other brackish-water fish such as scats, archerfishes, and datnoides. Juveniles can be temporarily kept in freshwater, but adults require brackish water.
Quick Summary
| Scientific Name | Monodactylus argenteus |
|---|---|
| Family | Monodactylidae |
| Category | Fish |
| Care Level | Intermediate |
| Water Type | Freshwater |
| Max Size | 27.0 cm (10.6") |
| Min Tank | 400 L (106 gal) |
| Min Group | 4+ |
| Diet | Omnivore. Accepts flakes, pellets, brine shrimp, mysis, vegetables (spinach, algae) and varied frozen foods. Varied diet is important. |
| Temperament | Active, sociable fish that forms schools. Peaceful with similarly sized fish. When young it tolerates freshwater, but adults require brackish to marine water. |
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