Mono Argentus
Mono argentus can be slowly transitioned to entirely salt water but will always need some salt in the water in a primarily freshwater fish tank. The argentus earns its name for the gold fringe (argentus is Latin for gold) around the fins. These are great schooling fish that do well with other fish and will eat prepared foods such as flake.
Quick Facts
| Scientific Name | Monodactylus argenteus |
|---|---|
| Origin | Indo-Pacific |
| Care Level | Moderate |
| Temperament | Peaceful |
| Adult Size | Up to 8–10″ |
| Lifespan | 10 years |
FAQ
Can Mono Argentus live in a completely freshwater tank?
Mono argentus can be kept in freshwater, but they require some salt in the water. A partially saltwater environment is recommended for optimal health.
What do Mono Argentus eat?
They eat prepared foods such as flake food and will accept a variety of commercial fish pellets.
Are Mono Argentus suitable for community tanks?
Yes, they are peaceful and do well in groups with other compatible fish species.

Sally Henderson –
I bought a group of Mono Argentus for my 55-gallon tank. They’ve been thriving for over six months. The gold fringe on their fins is very noticeable and adds a nice visual appeal. They’re active and don’t stress other fish. Easy to feed with flake food.
Neil Kerr –
The fish are peaceful and form a nice school. I added them gradually to my tank and they adapted well. I keep the water slightly salted as recommended. They eat flake regularly and stay healthy.
Felicity Lyman –
Great addition to a freshwater tank. The fish are colorful and active. I’ve had them for nine months and they’ve grown to about 9 inches. They don’t require much maintenance and enjoy the company of other fish.