
Fig 1

Fig 2

Fig 3
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Order :
Synbranchiformes
Family
: SYNBRANCHIDAE
Species : Monopterus javanensis
Maximum Length : 100 cm
The Asian Swamp Eel can be
found in various aquatic habitats including rivers, lakes, ponds, rice
paddies, marshes, swamps and drains. It is tolerant of polluted water
or low oxygen levels, and can breathe air efficiently enough to allow
migration across short distances of dry land. They are mainly nocturnal,
emerging to feed on fishes, crustaceans and other invertebrates.
Though swamp eels appear similar in shape to true eels they are in fact
unrelated : swamp eels lack scales, have greatly reduced fins, and have a
single v-shaped gill-opening beneath the throat rather than twin lateral
gill-openings as in other fishes. The Asian Swamp Eel is rounded in
cross-section, has a distinctive blunt snout and a tapered tail.
Colour is variable, but generally comprises a greenish-grey or brown
background speckled with pale-coloured spots or flecks.
Their eggs are laid in
bubble-nests in shallow water. Fry and juveniles are all female, but with
the onset of adulthood some females will develop into males.
This edible species occurs in India, China and Japan and throughout
Southeast Asia.
Fig 1 : 50 cm specimen in a boggy stream at Clementi Woodlands,
Singapore.
Fig 2 : This low-lying, swampy area harbours many Asian Swamp Eels,
Singapore.
Fig 3 : Close-up of a 70 cm specimen in an open-country, concretised drain,
Singapore.
References : F1
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