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 |
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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. |
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Family
Monodactylidae recorded for Singapore
from
Wee Y.C. and Peter K. L. Ng. 1994. A First Look at Biodiversity
in Singapore.
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Monodactylus
argenteus (Silver moony) |
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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.
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