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Harlequin jawfish (Stalix histrio) — Opistognathidae

Harlequin jawfish

Stalix histrio

The Harlequin jawfish (Stalix histrio) is a saltwater fish of the family Opistognathidae that grows up to 3 cm.

Length
3 cm
Water
Saltwater
Depth
1.0–25.0 m
Body shape
Elongated (eel-like)
Substrate
Mixed bottom
Danger
Harmless
Range
Asia: Australia, Hong Kong, Indonesia, Japan, New Caledonia

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Description

The harlequin jawfish is a small jawfish (Opistognathidae) from coastal waters of the Indo-West Pacific. The species grows to about 3 cm and has a stocky body with a large head and mouth and a mottled, marbled pattern. As a bottom-dweller it digs a vertical home burrow in sand and gravel bottoms with its mouth and snaps at drifting zooplankton from the entrance. The male broods the eggs in its mouth. The fish is harmless to humans.

Frequently asked questions

How do you recognise the Harlequin jawfish?

The Harlequin jawfish has an elongate, eel-like body, is mainly brown and shows a marbled pattern.

Where does the Harlequin jawfish live?

The Harlequin jawfish lives in the sea (marine waters) and is mostly found around mixed bottom. Asia: Australia, Hong Kong, Indonesia, Japan, New Caledonia

How big does the Harlequin jawfish get?

The Harlequin jawfish grows to a maximum of about 3 cm.

Is the Harlequin jawfish dangerous to humans?

No, the Harlequin jawfish is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.

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All data

Identification

English name
Harlequin jawfish sourced
Scientific name
Stalix histrio
Family
Opistognathidae
Other names
Harlequin jawfish; Black-marble jawfish verified

Appearance

Size class
Small verified
Max length (cm)
3.0 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown sourced
Pattern
Marbled sourced
Tail shape
Rounded inferred

Habitat & distribution

Water type
Saltwater sourced
Substrate
Mixed bottom sourced
Min depth (m)
1.0 verified
Max depth (m)
25.0 verified
Natural range
Asia: Australia, Hong Kong, Indonesia, Japan, New Caledonia sourced
Origin
Native inferred

Behaviour & biology

Territorial
Yes inferred
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred
Seasonality
Present year-round in its habitat; no pronounced seasonality known. inferred

For anglers

Fishing method
Small in size and barely an angling target; mostly caught incidentally or as baitfish. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless verified
First aid
This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status. verified

Status & sources

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

Same genus Stalix

More from the family Opistognathidae

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