🔥 Mono Fish (Monodactylus argenteus)
Add shimmering beauty and constant activity to your aquarium with the impressive Mono Fish. Also known as the Silver Moony, this striking species is recognised for its bright silver body, bold black-edged fins, and distinctive diamond-shaped profile. Their reflective scales catch the light beautifully, making them a spectacular sight as they swim together in groups.
Highly active and social, Mono Fish are best kept in schools where they display natural shoaling behaviour and create a lively, eye-catching display. They are an excellent choice for experienced aquarists looking to establish a large brackish aquarium.
🌿 Why Choose Mono Fish?
✨ Bright silver body with striking black fin edges
🐠 Active schooling fish with graceful swimming behaviour
🌊 Ideal for large brackish aquariums
👥 Best kept in groups for natural shoaling behaviour
⭐ Stunning display fish with a unique diamond-shaped body
When kept in groups, Mono Fish glide gracefully throughout the aquarium, creating a shimmering display as they move together in synchronised schools.
📏 Care Requirements
🧬 Scientific Name: Monodactylus argenteus
📛 Common Name: Mono Fish / Silver Moony
🏠 Tank Size: 300L+ recommended
📏 Adult Size: Up to 25cm
🌡️ Temperature: 24–28°C
⚗️ pH Range: 7.5–8.5
💧 Water Type: Brackish to marine (Specific Gravity approximately 1.005–1.020, increasing as they mature)
🧘 Temperament: Peaceful
🍽️ Diet: Flakes, pellets, algae-based foods, frozen foods, live foods, and vegetable matter
👥 Group Size: 5+ recommended
Mono Fish require spacious aquariums with excellent filtration, open swimming areas, and stable brackish water conditions. As they mature, they generally thrive in higher salinity and can even be successfully maintained in full marine aquariums.
🐠 Compatibility
Ideal for larger brackish aquariums with similarly sized species. They are excellent companions for scats, figure of eight puffers (in appropriate low-end brackish conditions while young), archerfish, knight gobies, and other peaceful brackish fish with similar environmental requirements. Avoid small fish that may become prey and aggressive species that may harass them.
Important Notes
Mono Fish are highly social and should never be kept alone, as solitary individuals often become stressed and less active. Although juveniles can adapt to lower-end brackish water, adults require progressively higher salinity for long-term health. A varied diet containing both vegetable matter and protein will help maintain their vibrant appearance and overall condition.
The Mono Fish is a fantastic choice for UK aquarists looking for a large, active, and eye-catching brackish species that combines shimmering silver beauty with peaceful schooling behaviour, making it a spectacular addition to any specialist aquarium.
