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Marbled swamp eel (Synbranchus marmoratus) — Synbranchidae

Marbled swamp eel

Synbranchus marmoratus
Family: Synbranchidae
LC · Least Concern

The Marbled swamp eel (Synbranchus marmoratus) is a freshwater fish of the family Synbranchidae that grows up to 150 cm.

Length
150 cm
Water
Freshwater
Diet
Carnivore
Behaviour
Solitary
Activity
Nocturnal
Body shape
Snake-like
Substrate
Sand / mud bottom
Danger
Harmless
Edibility
Commonly eaten

Description

The marbled swamp eel is a long, eel-like fish of the family Synbranchidae reaching about 1.5 metres. Unlike true eels it lacks pectoral and pelvic fins and the dorsal and anal fins are reduced to low skin folds; beneath the head lies a single, shared gill opening. The brown body is darkly marbled. The species lives in swamps, ditches, ponds and slow water of Central and South America and can gulp air through the throat, letting it survive oxygen-poor water and even drought buried in moist mud. At night it hunts insects, worms, crustaceans, small fish and tadpoles. Many individuals start as females and later become males.

Frequently asked questions

How do you recognise the Marbled swamp eel?

The Marbled swamp eel has a snake-like body, is mainly brown and shows a marbled pattern.

Where does the Marbled swamp eel live?

The Marbled swamp eel lives in fresh water and is mostly found around sand or mud bottom.

How big does the Marbled swamp eel get?

The Marbled swamp eel grows to a maximum of about 150 cm. On average the species is around 50 cm.

Is the Marbled swamp eel dangerous to humans?

No, the Marbled swamp eel is harmless to humans.

Is the Marbled swamp eel edible?

Yes, the Marbled swamp eel is commonly eaten.

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All data

Identification

Dutch name
Gemarmerde kieuwspleetaal inferred
English name
Marbled swamp eel verified
Scientific name
Synbranchus marmoratus
Family
Synbranchidae
Other names
Marbled swamp eel; Marmorated swamp Eel verified

Appearance

Size class
Extra large verified
Max length (cm)
150.0 verified
Average length (cm)
50.0 verified
Body shape
Snake-like sourced
Dominant colour
Brown sourced
Pattern
Marbled sourced
Tail shape
Rounded inferred
Mouth position
Terminal inferred
Lips
Thick / fleshy inferred
Barbels
No verified
Dorsal fins
One continuous sourced
Dorsal spines
No verified

Habitat & distribution

Water type
Freshwater verified
Substrate
Sand / mud bottom verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Social behaviour
Solitary verified
Territorial
Yes verified
Activity
Nocturnal inferred
Reproduction
Protogynous (female first) verified
Sexual dimorphism
No verified

For anglers

Edibility
Commonly eaten verified
Fishing method
Plaatselijk met de hand of in fuiken gevangen uit modder en moeras; een gewaardeerde voedselvis sourced
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 Synbranchus

More from the family Synbranchidae

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