Home · Heptapteridae · Whiptail catfish
Whiptail catfish (Mastiglanis asopos) — Heptapteridae

Whiptail catfish

Mastiglanis asopos
Family: Heptapteridae

The Whiptail catfish (Mastiglanis asopos) is a freshwater fish of the family Heptapteridae that grows up to 7 cm.

Length
6.6 cm
Water
Freshwater
Diet
Carnivore
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Harmless

Description

The whiptail catfish is a small three-barbeled catfish (Heptapteridae) from fresh water of the Amazon and Orinoco basins in South America. The species grows to about 7 cm and has a slender, pale, partly translucent body with extraordinarily long, whip-like barbels. As a nocturnal bottom-dweller it faces the current on sand bottoms by day and catches drifting insect larvae and small crustaceans at night. The fish is harmless to humans.

Frequently asked questions

How do you recognise the Whiptail catfish?

The Whiptail catfish has an elongate, eel-like body and is mainly white.

Where does the Whiptail catfish live?

The Whiptail catfish lives in fresh water and is mostly found around sand or mud bottom.

How big does the Whiptail catfish get?

The Whiptail catfish grows to a maximum of about 7 cm.

Is the Whiptail catfish dangerous to humans?

No, the Whiptail catfish is harmless to humans.

Download Fin's Fish Guide

Identify fish in seconds, log your catches and dives. Join the TestFlight beta.

Get the beta →

All data

Identification

Dutch name
Zweepdraad-meerval sourced
English name
Whiptail catfish sourced
Scientific name
Mastiglanis asopos
Family
Heptapteridae

Appearance

Size class
Small verified
Max length (cm)
6.6 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
White sourced
Tail shape
Forked inferred
Barbels
Yes sourced

Habitat & distribution

Water type
Freshwater sourced
Substrate
Sand / mud bottom sourced
Origin
Native inferred

Behaviour & biology

Diet
Carnivore inferred
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

More from the family Heptapteridae

Download Fin's Fish Guide

Identify fish in seconds, log your catches and dives. Join the TestFlight beta.

Get the beta →