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Mousetail knifefish (Gymnorhamphichthys rondoni) — Rhamphichthyidae

Mousetail knifefish

Gymnorhamphichthys rondoni

The Mousetail knifefish (Gymnorhamphichthys rondoni) is a freshwater fish of the family Rhamphichthyidae that grows up to 15 cm.

Length
15 cm
Water
Freshwater
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Mixed bottom
Danger
Harmless

Description

The mousetail knifefish is a weakly electric knifefish (Rhamphichthyidae) from fresh water of the Amazon and Orinoco basins in South America. The species grows to about 15 cm and has an elongate, pale, partly translucent body with a tubular snout and a thin, mouse-tail-like tail tip. As a nocturnal bottom-dweller it buries itself in the sand by day and searches for small invertebrates at night with a weak electric organ. The fish is harmless to humans.

Frequently asked questions

How do you recognise the Mousetail knifefish?

The Mousetail knifefish has an elongate, eel-like body and is mainly white.

Where does the Mousetail knifefish live?

The Mousetail knifefish lives in fresh water and is mostly found around mixed bottom.

How big does the Mousetail knifefish get?

The Mousetail knifefish grows to a maximum of about 15 cm.

Is the Mousetail knifefish dangerous to humans?

No, the Mousetail knifefish is harmless to humans.

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All data

Identification

Dutch name
Muisstaart-mesvis sourced
English name
Mousetail knifefish sourced
Scientific name
Gymnorhamphichthys rondoni
Family
Rhamphichthyidae

Appearance

Size class
Small verified
Max length (cm)
15.0 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
White sourced
Tail shape
Straight inferred

Habitat & distribution

Water type
Freshwater sourced
Substrate
Mixed bottom sourced
Origin
Native inferred

Behaviour & biology

Territorial
No inferred
Activity
Nocturnal sourced
Reproduction
Separate sexes inferred
Sexual dimorphism
No inferred

For anglers

Fishing method
Klein van stuk en nauwelijks een hengelsportdoel; wordt vooral incidenteel of als aasvis gevangen. inferred
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 Gymnorhamphichthys

More from the family Rhamphichthyidae

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