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          | Phylum Chordata 
            > Subphylum Vertebrate > fishes |  
        
          
            | Silver 
            moony Monodactylus 
            argenteus
 Family Monodactylidae
 updated Sep 2020
 Where 
            seen? Seldom seen on the intertidal, but this elegant 
            fish was showcased at the Sungei Buloh Wetlands Reserve visitor 
            centre's aquarium. Groups of them are sometimes seen by divers at Pulau Hantu. Fishermen are also sometimes seen catching them on 
            our shores. In the wild, they may school in large numbers in open 
            waters, under jetties and in bays. It is also known as Diamond fish 
            and Silver batfish.
 
 What are moonies? Silver moonies belong to Family Monodactylidae. 
            According to FishBase: 
            the family has 2 genera and 5 species. Found in schools in estuaries 
            and near freshwater streams, in harbours and near jetties. Some species 
            are inhabit brackish waters and may even swim far up into freshwater 
            systems.
 
 Features: 4-25cm. Body flattened sideways into a rhomboid 
            shape. Adults silvery with a yellow and dusky dorsal fin and lack 
            pelvic fins. Juveniles have pelvic fins, are more colourful with almost 
            all yellow dorsal fin and a narrow black bar on the head through the 
            eye and another bar over the gill cover. Some describe the juveniles 
            as sometimes being dark, almost black, with a red tip on the dorsal 
            fin. 
Being really flat, from the front, the fish looks like a stick! 'Mono' 
            means 'one' and 'daktylos' means 'finger'.
 
 Sometimes confused with the Batfish.
 |  
        
          |  Sungei Buloh Wetland Reserve, Oct 03
 |  Seen from the front, it resembles a stick!
 Sungei Buloh Wetland Reserve, Oct 03
 |  |  
        
          
            | What does it eat? It feeds on 
            plankton and detritus and are said to be highly territorial. 
 Human uses: The fish is sometimes 
            caught by local anglers and is considered a common and popular freshwater 
            aquarium fish.
 |  
 
        
          
            | Silver 
      moonies on Singapore shores |  
 
        
          
            | Other sightings on Singapore shores |  
 
        
          |  Siloso, May 09
 Photo shared by Ivan Kwan on his 
          blog.
 |  |  |  
 
         
          | Family 
            Monodactylidae recorded for Singapore from 
            Wee Y.C. and Peter K. L. Ng. 1994. A First Look at Biodiversity 
            in Singapore.
 
 
 
               
                |  | Monodactylus 
                  argenteus (Silver moony) |  |  
 
         
          | Links 
 References
 
              Wee Y.C. 
                and Peter K. L. Ng. 1994. A First Look at Biodiversity in Singapore. 
                National Council on the Environment. 163pp.Allen, Gerry, 
                2000. Marine 
                Fishes of South-East Asia: A Field Guide for Anglers and Divers. 
                Periplus Editions. 292 pp.Kuiter, Rudie 
                H. 2002. Guide 
                to Sea Fishes of Australia: A Comprehensive Reference for Divers 
                & Fishermen 
                New Holland Publishers. 434pp. Lieske, 
                Ewald and Robert Myers. 2001. Coral 
                Reef Fishes of the World 
                Periplus Editions. 400pp. |  |  |