Common name: Mono

General information

The Silver Moony, Monodactylus argenteus, is a distinctive and attractive fish known for its diamond-shaped body and shimmering silver coloration. It is a member of the family Monodactylidae, commonly referred to as moonyfish or fingerfish. This species is often sought after by aquarists for its peaceful demeanor and schooling behavior, making it a captivating addition to larger brackish or marine aquariums.

Care

Silver Moonies require a spacious tank to accommodate their active swimming habits and potential adult size of up to 25 centimeters (10 inches). They thrive in groups, so keeping them in schools of five or more is recommended to promote natural behavior and reduce stress. A varied diet of meaty foods and plant matter, along with high-quality flake or pellet food, will help maintain their health and coloration.

Reproduction

In the wild, Silver Moonies are known to spawn in brackish waters. In captivity, breeding is less common, but with the right conditions, including a gradual increase in salinity, it is possible. The eggs are pelagic, and the larvae require specialized care, making breeding a challenge for the hobbyist.

Habitat

Monodactylus argenteus is found in coastal regions, estuaries, and mangrove swamps throughout the Indo-Pacific region. They are euryhaline, meaning they can tolerate a wide range of salinities, which should be considered when setting up an aquarium for these fish. In the wild, they are often observed in large schools, cruising the middle water layers in search of food.