Exotic – Mono Diamond Moonfish 5cm

Monodactylus argenteus

Common Names:

Mono Fish, Silver Moony, Diamond Moonfish

Family:

Monodactylidae

Origin:

Coastal waters, estuaries, and mangroves of the Indo-Pacific, including East Africa, Australia, and Southeast Asia.

1. Appearance & Behavior

Mono Argenteus has a laterally compressed, diamond-shaped silver body with yellowish hues on the fins and head. They are highly active schooling fish that require a large tank and plenty of swimming space.

• Size: Up to 25 cm (10 inches) in captivity
• Lifespan: 710 years
• Temperament: Peaceful but should be kept in groups of at least 5 to reduce stress and aggression

2. Tank Requirements

Since Monos transition from freshwater to brackish and even marine environments as they mature, their tank setup should reflect this:

• Minimum Tank Size: 250 liters (66 gallons) for juveniles, larger for adults
• Water Type: Brackish to marine (Juveniles can tolerate freshwater, but they require brackish water as they grow)
• Substrate: Sand or fine gravel (mimicking coastal environments)
• Decor: Driftwood, rocks, and marine-style dcor; leave open swimming space
• Lighting: Moderate to bright

3. Water Parameters

• Salinity: 1.0051.018 SG (gradually increase as they mature)
• Temperature: 2428C (7582F)
• pH: 7.58.5
• Hardness: 820 dGH
• Filtration: Strong filtration and high oxygenation (they are messy eaters and produce a lot of waste)

4. Tank Mates

Mono Argenteus are social but require specific tank mates due to their brackish water needs. Suitable tank mates include:

• Scats (Scatophagus spp.)
• Archerfish (Toxotes spp.)
• Brackish puffers (e.g., Green Spotted Puffer, if carefully managed)
• Other Monos

Avoid slow-moving, aggressive, or very small fish, as Monos can be fin nippers.

5. Diet & Feeding

Monos are omnivorous and need a varied diet to stay healthy.

• Staple Foods: High-quality marine flakes or pellets
• Live/Frozen Foods: Brine shrimp, bloodworms, mysis shrimp
• Vegetables: Blanched spinach, algae wafers
• Feeding Frequency: 23 times a day in small amounts

Limited Quantity Available – Will Sell out Fast!

Note:
We cant ship Livestock and Live Plants to WA and TAS due to State Restrictions. Kindly check out our DOA and other policies before purchase!!

What to Expect from Us
All Aquatic plants and animals come with a 100% live arrival guarantee!!