Phylum Chordata
> Subphylum Vertebrate > fishes |
Needlefishes
Family Belonidae
updated
Sep 2020
Where
seen? These long stick-like fishes with pointed jaws are sometimes seen
near mangroves as well as reef flats. Some may even be found upstream in freshwater. During
the day, larger ones are sometimes seen at jetties in small groups.
What are needlefishes? Needlefishes
belong to the Family Belonidae. According to FishBase:
the family has 10 genera and 34 species. Besides marine species, some
species are found in freshwater.
Features: 50cm-1m long or more,
these fishes have a long silvery body. In some, the cross-section
of the body is circular, in others rectangular. They usually
have a dark blue stripe along the body length, and the tip of the
lower jaw may be red or orange. They have long, narrow
pointed jaws that are beak- or needle-like, thus their common name.
'Belone' means 'needle' in Greek. These slender jaws are usually filled
with sharp needle-like teeth. The jaws are shorter in juveniles, elongating
as they age. Has one single dorsal fin.
Sometimes mistaken for halfbeaks.
Halfbeaks are generally shorter and only their lower jaw is elongated
while the upper jaw is very short. In needlefishes, both the upper
and lower jaws are of equal length and usually filled with sharp teeth.
Here's more on how to tell apart stick-like
fishes commonly seen on our shores. |
Chek Jawa, Nov 09 |
Chek Jawa, Nov 09 |
Camouflage in the open: Like other fishes that live near the water surface, they are usually
darker coloured from above, and silvery from below. Thus they are
camouflaged from predators both above and below the water.
Jumping Needles: These fishes tend to skitter or make shallow leaps out at the water
surface. They appear to be attracted to lights at night and there
are stories of these fishes leaping into fishermen's boats at night.
Occasionally, there are reports of people accidentally being killed
by the spear-like jaws of these leaping fishes.
What do they eat? These surface-dwelling
fishes hunt small surface-dwelling fishes, catching these with a sideway
movement of their jaws. They in turn are hunted by larger fishes including
dolphins. |
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Baby needlefishes: Their eggs
have entangling tendrils so the eggs cling to one another or to objects
in the water. Juveniles of some species shelter in mangroves, moving
out to deeper waters when they mature.
Human uses: In some places, they
are caught for eating. Although the flesh is said to taste good, the
fishes have many small bones which are green and thus appear rather
unappetising. |
Needlefishes
on Singapore shores |
Other sightings on Singapore shores |
Chek Jawa, Oct 16
Photo shared by James Chua on facebook. |
Chek Jawa, Oct 16 |
|
St John's Island, Dec 16
Photo shared by Marcus Ng on flickr. |
Cyrene Reef, Aug 13
Photo shared by Loh Kok Sheng on flickr. |
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Seringat-Kias, Aug 15
Photo shared by Loh Kok Sheng on flickr. |
Family
Belonidae recorded for Singapore
from
Wee Y.C. and Peter K. L. Ng. 1994. A First Look at Biodiversity
in Singapore.
*from Lim, Kelvin and Jeffrey K Y Low, Guide to Common Marine Fishes
of Singapore
**from WORMS
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Belone
platyura=**Platybelone argalus platyura
Strongylura strongylura (Spot-tail needlefish)
*Strongylura leiura (Banded or Slender needlefish)
Tylosurus annulatus=**Tylosurus crocodilus crocodilus
Tylosurus crocodilus=**Tylosurus crocodilus crocodilus
Tylosurus insicus
Tylosurus leiurus=**Strongylura leiura
Tylosorus melanotus=**Tylosurus acus melanotus
Tylosorus strongylurus=**Strongylura strongylura |
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Links
References
- Kelvin K. P. Lim. 26 February 2016. Large congregation of yellowfin needlefish at Harbourfront. Singapore Biodiversity Records 2016: 26-27
- 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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