Mono Argentus (Indian Ocean)

The Mono is an interesting fish with shimmering silver scales, earning it another name, the Silver Moony or Moon Fish. Its fins are a lovely yellow color, and young fish have pitch black stripes over their face. At nighttime or when stressed it can darken its color quite substantially. Males and females are visually identical. The Mono grows to 10 inches and once fully grown needs an aquarium at least 125 gallons.

In the wild Mono live in light brackish water when juvenile and gradually swim into salt water as they grow. Our Monos are acclimated to full salt water conditions, but they could also be kept in a brackish aquarium. The Mono does best when kept in a school, as it may become nervous when alone. The group will establish a pecking order, so to reduce aggression we recommend at least four individuals.

They are friendly with other fish and are commonly kept in a mixed school with Scats. Both these fish are attractive and very hardy. Most other peaceful fish make good tankmates, except for very tiny fish which may be seen as food. Small shrimp may also be eaten, but most other animals including coral will typically not be bothered.

Monos are omnivorous and will eat any type of food including flakes. Plenty of vegetable matter including marine algae and Spirulina helps to keep them healthy, combined with frozen Mysis shrimp, enriched brine shrimp, pellets, and other high quality items. They may also eat vegetables such as spinach or broccoli, and possibly some tender plants or macroalgae.