''Monodactylus argentus'' is a species of fish in the family Monodactylidae, the moonyfishes. Its common names include silver moonyfish, or silver moony, butter bream, and diamondfish. It is native to the western Pacific and Indian Oceans, including the Persian Gulf, Red Sea, and associated estuaries, such as the Mekong Delta.
This species reaches a maximum length of about 27 centimeters. It is bright shiny silver with yellowish edges to the fins. The dorsal and anal fins have black tips... more