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Phylum Chordata > Subphylum Vertebrate > fishes
Halfbeaks
Family Hemiramphidae
updated Oct 2016

if you learn only 3 things about them ...
They specialise in foraging at the water surface.
Their lower jaw is many times longer than their upper jaw.
Some are well camouflaged as floating twigs or rubbish.

Where seen?
These stick-like fishes are commonly encountered on many of our shores. They swim at the water surface, often quite actively at night. Small ones may be mistaken for floating twigs or other bits of flotsam.

What are halfbeaks?
Halfbeaks belong to the Family Hemiramphidae. According to FishBase: the family has 12 genera and 85 species. They are found in the Atlantic, Indian and Pacific Oceans.

Features: To about 10cm long. Body long and stick-like; generally cylindrical. The halfbeak is so named because its lower jaw is much longer, while its upper jaw is short and triangular. 'Hemi' means half; while 'rhamphos' means beak or bill in Greek. The jaws have several rows of small teeth and the tip of the long, spike-like lower jaw is often brightly coloured. The eyes are relatively large and scales are large too.

Sometimes mistaken for needlefishes. Needlefishes (Family Belonidae) are usually much longer. The jaws of needlefishes are also elongated and both the upper and lower jaws are of equal length and usually filled with sharp teeth. Young barracuda (Family Sphyraenidae) also appear similar at first glance. Here's more on how to tell apart stick-like fishes commonly seen on our shores.

Surface dwellers: It is well adapted to living at the water surface. Usually darker on the top while the sides and underside are silvery. Thus its darker blue or green back blends in with the water surface when above-water predators look down on it. While at the same time, underwater predators looking up at it can't really see it well either as its silvery body blends with the sunlit waters. Its unfish-like body shape also means it is often dismissed as a floating stick. Some small ones are brown and twig-like.

What do they eat?
Halfbeaks eat things that float on the surface such as algae, tiny animals like zooplankton and other fishes. Some halfbeak species eat land insects that might fall into the water, while others eat seagrasses and algae.

Halfbeak babies: Most halfbeak lay eggs attached to seaweed in shallow waters. Some, however, may give birth to live young. In some, fertilisation takes place internally and the males have modified fins to fertilise the females with.

Human uses: Halfbeaks apparently taste good and large species (like the Black-barred halfbeak) are eaten in some places, sold fresh and dried salted. Or they are used as bait fish. They are caught with nets under lights at night. Some freshwater species are popular in the live aquarium trade.

Status and threats: Our halfbeaks are not listed among the threatened animals of Singapore. However, like other creatures of the intertidal zone, they are affected by human activities such as reclamation and pollution.

Sungei Buloh Wetland Reserve, Jan 04



The lower jaw is many times
longer than the upper jaw.
Sungei Buloh, May 05


A young halfbeak?
Pulau Hantu, Jan 06

Halfbeaks on Singapore shores


Family Hemiramphidae recorded for Singapore
from Wee Y.C. and Peter K. L. Ng. 1994. A First Look at Biodiversity in Singapore.
*Lim, Kelvin K. P. & Jeffrey K. Y. Low, 1998. A Guide to the Common Marine Fishes of Singapore.
^from WORMS

  Halfbeaks commonly seen awaiting identification
  Broad-nosed halfbeak
Plain halfbeak
Twig-like halfbeak

  Family Hemiramphidae
  Hemiramphus dussumieri=^Hyporhamphus dussumieri
Hemiramphus georgii=^Rhynchorhamphus georgii
Hemiramphus marginatus
Hemiramphus russelli=^Rhynchorhamphus georgii
Hemiramphus erythrorinchus=^Hyporhamphus erythrorinchus
Hemiramphus far
(Black-barred halfbeak)
Hemiramphus fasciatus=^Hemiramphus lutkei
Hemiramphus tweediei=^Euleptorhamphus viridis

Hemiramphodon phaiosoma
Hemiramphodon pogonognathus=^Hemiramphus pogonognathus
(freshwater)

Hyporhamphus gaimardi
Hyporhamphus melanurus
Hyporhamphus quoyi
(Quoy's halfbeak)
*Hyporhamphus limbatus (Congaturi halfbeak)

  ^Now Family Zenarchopteridae
  Dermogenys pusilla (Pygmy halfbeak)
Dermogenys sumatrana


Zenarchopterus buffonis
(Striped-nosed halfbeak)
Zenarchopterus dispar
Zenarchopterus ectuntio

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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