The Silver Moony (Monodactylus argenteus) is a striking brackish water fish with a silvery diamond-shaped body. Known for its adaptability, it’s also called the Sea Angel or Diamond Moonfish.
Scientific Name
Monodactylus argenteus
Habitat
Coastal bays, estuaries, tidal creeks, and lower parts of rivers. Can tolerate both fresh and saltwater conditions.
Conservation
Not listed as endangered; commonly found and kept in aquariums due to its peaceful nature and appearance.
Lifespan
Typically lives 7–10 years in captivity with good care.
Fun Fact
Juvenile Silver Moonies have black bands and more yellow tones, making them especially striking during their early stages.
Diet
Omnivorous – eats plankton, detritus, flake food, pellets, frozen foods, and some plant matter.
Average Size
Grows up to 27 cm (11 inches) in the wild; typically 15 cm (6 inches) in aquariums.
Location / Placement info
Displayed in the Coastal Reef Exhibit, near the Ocean-View Tunnel
FAQ
What is the lifespan of the Silver Moony?
Silver Moony fish can live up to 5–7 years in captivity with proper care and brackish to marine water conditions.
What do Silver Moony fish eat?
They are omnivores and eat algae, small crustaceans, worms, and flakes or pellets.
Are Silver Moony fish aggressive?
No, they are peaceful and social, best kept in groups.
What is the ideal tank size for Silver Moony?
A minimum of 75 gallons is recommended for a small group, with good filtration and swimming space.
Do Silver Moony fish need a reef environment to survive?
No, they do not require corals but thrive in brackish to marine tanks with open space.
How big do Silver Moony fish grow?
They can grow up to 6–8 inches (15–20 cm) in length.
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