Home · Mastacembelidae · Longtail spiny eel
Longtail spiny eel (Mastacembelus frenatus) — Mastacembelidae

Longtail spiny eel

Mastacembelus frenatus
LC · Least Concern

The Longtail spiny eel (Mastacembelus frenatus) is a freshwater fish of the family Mastacembelidae that grows up to 40 cm.

Length
40 cm
Water
Freshwater
Diet
Carnivore
Behaviour
Solitary
Activity
Nocturnal
Body shape
Snake-like
Substrate
Sand / mud bottom
Danger
Harmless
Range
Fresh water of Central and East Africa (including the Congo and Zambezi basins and the great lakes), in rivers and lakes with a soft bottom.
Edibility
Rarely eaten

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Description

The longtail spiny eel is a long, eel-like freshwater fish of the family Mastacembelidae (spiny eels) reaching about 40 cm. The brown, marbled body is strongly elongate and ends in a pointed, mobile snout with which the fish probes among stones and in the bottom for prey. A row of separate, sharp spinelets stands before the soft-rayed dorsal fin. By day it often buries itself in sand or mud with only the snout showing; at night it emerges to hunt insect larvae, worms and small crustaceans. The species comes from Central and East Africa, including the Congo and Zambezi basins and the great lakes. Because of its snake-like shape it is popular in the aquarium hobby.

Frequently asked questions

How do you recognise the Longtail spiny eel?

The Longtail spiny eel has a snake-like body, is mainly brown and shows a marbled pattern. Long, eel-like fish with a pointed, mobile snout and a row of separate spinelets in front of the dorsal fin; buries itself in the sand during the day.

Where does the Longtail spiny eel live?

The Longtail spiny eel lives in fresh water and is mostly found around sand or mud bottom. Fresh water of Central and East Africa (including the Congo and Zambezi basins and the great lakes), in rivers and lakes with a soft bottom.

How big does the Longtail spiny eel get?

The Longtail spiny eel grows to a maximum of about 40 cm.

Is the Longtail spiny eel dangerous to humans?

No, the Longtail spiny eel is harmless to humans. None required: this species is harmless to humans.

Is the Longtail spiny eel edible?

The Longtail spiny eel is rarely eaten.

More photos

Longtail spiny eel (Mastacembelus frenatus) — Mastacembelidae — 2
Nkosinathi Mazungula (CC BY 4.0) via GBIF — SAIAB
Longtail spiny eel (Mastacembelus frenatus) — Mastacembelidae — 3
iNaturalist ((c) Rob Palmer, some rights reserved (CC BY-NC-SA))
Longtail spiny eel (Mastacembelus frenatus) — Mastacembelidae — 4
iNaturalist ((c) joe_cutler, some rights reserved (CC BY-NC))
Longtail spiny eel (Mastacembelus frenatus) — Mastacembelidae — 5
iNaturalist ((c) Rob Palmer, some rights reserved (CC BY-NC-SA))
Fin

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All data

Identification

English name
Longtail spiny eel verified
Scientific name
Mastacembelus frenatus
Family
Mastacembelidae
Other names
Longtail spiny eel; Longtail spinyeel; Longtail spiny-eel; Longtailed spinyeel; East african spiny eel; Shorttail spiny eel; Spiny eel verified

Appearance

Size class
Medium verified
Max length (cm)
40.0 verified
Body shape
Snake-like sourced
Dominant colour
Brown sourced
Pattern
Marbled sourced
Tail shape
Rounded inferred
Mouth position
Inferior (downward) inferred
Lips
Thick / fleshy inferred
Barbels
No verified
Dorsal fins
One continuous sourced
Dorsal spines
Yes verified

Habitat & distribution

Water type
Freshwater verified
Substrate
Sand / mud bottom verified
Natural range
Fresh water of Central and East Africa (including the Congo and Zambezi basins and the great lakes), in rivers and lakes with a soft bottom. verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Diet (detail)
Insect larvae, worms and small crustaceans from the bottom sourced
Social behaviour
Solitary verified
Territorial
Yes verified
Activity
Nocturnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
No verified
Seasonality
Spawns in the rainy season; eggs and larvae drift in open water. sourced
Special features
Long, eel-like fish with a pointed, mobile snout and a row of separate spinelets in front of the dorsal fin; buries itself in the sand during the day. sourced

For anglers

Edibility
Rarely eaten verified
Fishing method
Bottom fishing with natural bait (worm, shrimp or fish) on or just above the seabed. inferred
Regulations source
FishBase ↗ inferred

Safety

Danger to humans
Harmless verified
First aid
None required: this species is harmless to humans. sourced

Status & sources

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

Same genus Mastacembelus

More from the family Mastacembelidae

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