MONO (Monodactylus Argentius)

The Mono Monodactylus argenteus is a beautiful silvery fish that definitely has a place in any brackish aquarium. This Silver Moony is one of the aquarium favorites. It is a good sized fish, deep bodied and laterally compressed with an attractive roundish diamond shape.

Overall the Mono Fish is silver in color highlighted with a light yellow on the dorsal, anal and tail fins. Two vertical black stripes adorn the front, one running through the eye and a second across the gill. When they are young they also have a bright yellow dorsal fin which adds to their appeal. The disc-like shape and shiny silver color have led to all sorts of descriptive common names like Silver Moony, Silver Moonfish, Silver Batfish, Diamond Moonfish, Diamondfish, Fingerfish, Kitefish, and even Malayan Angel.

http://animal-world.com/encyclo/fresh/perches/MonoArgentus.php