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Arrow loach (Nemacheilus masyae) — Nemacheilidae

Arrow loach

Nemacheilus masyae
Family: Nemacheilidae

The Arrow loach (Nemacheilus masyae) is a freshwater fish of the family Nemacheilidae that grows up to 14 cm.

Length
13.5 cm
Water
Freshwater
Diet
Carnivore
Activity
Nocturnal
Body shape
Snake-like
Substrate
Sand / mud bottom
Danger
Harmless
Range
Asia: Cambodia, Malaysia, Thailand
Edibility
Commonly eaten

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Description

The Arrow loach is a stone loach (Nemacheilidae) from fast-flowing, clear fresh water of the Mekong basin in Southeast Asia. The species grows to about 6 cm and has a slender, elongate, brown-speckled body with small barbels around the mouth. As a bottom-dweller it lives among gravel and stones of oxygen-rich streams and rivers and snaps at insect larvae and small invertebrates. The fish is harmless to humans.

Frequently asked questions

How do you recognise the Arrow loach?

The Arrow loach has a snake-like body, is mainly brown and shows a spots pattern.

Where does the Arrow loach live?

The Arrow loach lives in fresh water and is mostly found around sand or mud bottom. Asia: Cambodia, Malaysia, Thailand

How big does the Arrow loach get?

The Arrow loach grows to a maximum of about 14 cm.

Is the Arrow loach dangerous to humans?

No, the Arrow loach 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.

Is the Arrow loach edible?

Yes, the Arrow loach is commonly eaten.

More photos

Arrow loach (Nemacheilus masyae) — Nemacheilidae — 2
iNaturalist ((c) Jiayuan Lin, some rights reserved (CC BY-NC))
Arrow loach (Nemacheilus masyae) — Nemacheilidae — 3
Florida Museum of Natural History Ichthyology (CC BY-NC 4.0) via GBIF — UF
Arrow loach (Nemacheilus masyae) — Nemacheilidae — 4
Florida Museum of Natural History Ichthyology (CC BY-NC 4.0) via GBIF — UF
Arrow loach (Nemacheilus masyae) — Nemacheilidae — 5
iNaturalist ((c) muangpaisuetrong, some rights reserved (CC BY-NC))

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All data

Identification

English name
Arrow loach sourced
Scientific name
Nemacheilus masyae
Family
Nemacheilidae

Appearance

Size class
Small verified
Max length (cm)
13.5 verified
Body shape
Snake-like sourced
Dominant colour
Brown sourced
Pattern
Spots sourced
Tail shape
Straight
Barbels
Yes sourced

Habitat & distribution

Water type
Freshwater sourced
Substrate
Sand / mud bottom sourced
Natural range
Asia: Cambodia, Malaysia, Thailand sourced
Origin
Native

Behaviour & biology

Diet
Carnivore
Diet (detail)
Small fishes, crustaceans and invertebrates
Territorial
No
Activity
Nocturnal
Reproduction
Separate sexes
Sexual dimorphism
No
Seasonality
Present year-round in its habitat; no pronounced seasonality known.

For anglers

Edibility
Commonly eaten
Fishing method
Small in size and barely an angling target; mostly caught incidentally or as baitfish.
Regulations source

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 Nemacheilus

More from the family Nemacheilidae

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