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Japanese halfbeak (Hyporhamphus sajori) — Hemiramphidae

Japanese halfbeak

Hyporhamphus sajori
Family: Hemiramphidae
LC · Least Concern

The Japanese halfbeak (Hyporhamphus sajori) is a fish that lives in both fresh and salt water of the family Hemiramphidae that grows up to 40 cm.

Length
40 cm
Water
Euryhaline
Depth
30.0–? m
Diet
Omnivore
Behaviour
Schooling
Activity
Diurnal
Body shape
Elongated (eel-like)
Substrate
Open water
Danger
Harmless
Edibility
Highly prized

Description

The Japanese halfbeak is a slender, silvery surface fish of the family Hemiramphidae (halfbeaks) reaching about 40 cm. Characteristic is the unequal jaw: the upper jaw is short and triangular, while the lower jaw extends far as a long, needle-like beak with a red or orange tip. A fine band runs along the silver flank. The species forms schools in surface water of coast, bays and estuaries of the northwest Pacific and tolerates brackish water. As an omnivore it eats plankton, small crustaceans and drifting algae. In Japan and neighbouring countries it is a valued table fish, especially raw as sashimi, and is targeted by fisheries.

Frequently asked questions

How do you recognise the Japanese halfbeak?

The Japanese halfbeak has an elongate, eel-like body, is mainly silver-grey and shows a horizontal stripes pattern.

Where does the Japanese halfbeak live?

The Japanese halfbeak lives in both fresh and salt water and is mostly found around open water.

How big does the Japanese halfbeak get?

The Japanese halfbeak grows to a maximum of about 40 cm.

Is the Japanese halfbeak dangerous to humans?

No, the Japanese halfbeak is harmless to humans.

Is the Japanese halfbeak edible?

Yes, the Japanese halfbeak is a highly prized food fish.

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All data

Identification

Dutch name
Japanse halfsnavelvis inferred
English name
Japanese halfbeak verified
Scientific name
Hyporhamphus sajori
Family
Hemiramphidae
Other names
Japanese halfbeak; Japanese needlefish verified

Appearance

Size class
Medium verified
Max length (cm)
40.0 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Silver / grey sourced
Pattern
Horizontal stripes sourced
Tail shape
Forked inferred
Mouth position
Superior (upward) inferred
Lips
Thin inferred
Barbels
No verified
Dorsal fins
One continuous sourced
Dorsal spines
No verified

Habitat & distribution

Water type
Euryhaline verified
Substrate
Open water verified
Min depth (m)
30.0 verified
Origin
Native verified

Behaviour & biology

Diet
Omnivore verified
Social behaviour
Schooling verified
Territorial
No verified
Activity
Diurnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
No verified

For anglers

Edibility
Highly prized verified
Fishing method
Met netten of fijne haakjes aan het oppervlak gevangen; gewaardeerd voor sashimi sourced
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless verified

Status & sources

Sources
FishBase via GBIF (DwC-A), CC-BY-NC 4.0

Same genus Hyporhamphus

More from the family Hemiramphidae

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