Mono Argentus (Monodactylus argenteus)

Fish in the family Monodactylidae. Moderate care. Reef Safe with Caution.

Mono Argentus

Quick facts

Scientific nameMonodactylus argenteus
FamilyMonodactylidae
Also known asSilver Mono, Mono Argentus, Silver Diamond Fish
Care levelModerate
Reef safetyReef Safe with Caution
TemperamentSemi Aggressive
Dietomnivore
Adult size10 in
Minimum tank size75 gallons
Water parametersTemperature: 72-82°F pH: 8.1-8.3 Salinity: 1.02-1.025
Feeding scheduleFeed 2-3 times daily

Appearance

Mono Argentus are highly compressed, disc-shaped fish with a silvery-white body and black vertical bands crossing the head and body. They have a yellow dorsal fin and distinctive yellow markings on the gill covers and lower jaw.

Diet and feeding

Small fish, crustaceans, marine algae, frozen mysis, brine shrimp, and prepared foods.

Difficulty and care for the Mono Argentus

Moderate - The silver diamond fish, often kept in reef tanks. Can adapt to brackish or marine conditions. Best suited for intermediate aquarists.

Common health issues

Marine ich, Fin rot, Swim bladder disorder, Bacterial infections, Parasitic infestations

Origin and habitat

Indo-Pacific region from West Africa through the Red Sea, Persian Gulf, and Indian Ocean to Southeast Asia and northern Australia.

Keeper notes

The silver diamond fish, often kept in reef tanks despite being brackish/marine. Can adapt to various salinities. Will eat small fish.

Log Mono Argentus in your reef tank

Reef Trak gives you the full record on every species in your tank: acquisition date, source, photos, parameters at time of stocking, and links to maintenance and feeding events. Track Mono Argentus alongside everything else in your reef.