Mono Angel

Overview

The Mono / Silver Moony (Monodactylus argenteus) is a brackish species that is one of the most beautiful silver-coloured fish available. They require brackish to full marine conditions — NOT freshwater.

Water Parameters

• Temperature: 24–28°C (75–82°F)
• pH: 7.5–8.5
• Hardness: 15–25 dGH (brackish to marine)
• Salinity: 1.005–1.020 specific gravity (brackish to marine)

Tank Setup

• Minimum tank size: 200 litres for 3+
• Substrate: Sand or crushed coral
• Decor: Rocks, driftwood; open swimming space; tight-fitting lid essential

Diet

• Base: Quality pellets, flake
• Treats: Frozen bloodworms, brine shrimp, mysis shrimp, blanched vegetables

Temperament & Tank Mates

• Temperament: Semi-aggressive; schooling fish
• Best companions: Other brackish species — archerfish, puffers, scats
• Avoid: Freshwater-only species, very small fish

Common Issues

• NOT a freshwater species — requires brackish conditions
• They jump — secure lid essential
• Grows to 15–20 cm
• Lifespan: 5–10 years