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Alligatorfish (Aspidophoroides monopterygius) — Agonidae

Alligatorfish

Aspidophoroides monopterygius
Family: Agonidae
LC · Least Concern

The Alligatorfish (Aspidophoroides monopterygius) is a saltwater fish of the family Agonidae that grows up to 22 cm.

Length
22 cm
Water
Saltwater
Depth
0.0–695.0 m
Diet
Carnivore
Behaviour
Solitary
Activity
Diurnal
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Harmless
Edibility
Not eaten

Description

The alligatorfish is an elongate bottom fish of the family Agonidae (poachers) reaching about 22 cm. The slender, rearward-tapering body is encased in rings of bony plates, making it stiff and angular - hence the name alligatorfish. The head has a small, inferior mouth. The species lives over sand and mud bottoms of cold coastal water along the east coast of Canada and the northeastern USA. Because of its armour it swims slowly and mostly stays on the bottom, where it searches for small crustaceans and worms. Because of its small size it has no fishery value and is mainly seen as bycatch.

Frequently asked questions

How do you recognise the Alligatorfish?

The Alligatorfish has an elongate, eel-like body, is mainly brown and shows a horizontal stripes pattern.

Where does the Alligatorfish live?

The Alligatorfish lives in the sea (marine waters) and is mostly found around sand or mud bottom.

How big does the Alligatorfish get?

The Alligatorfish grows to a maximum of about 22 cm. On average the species is around 14 cm.

Is the Alligatorfish dangerous to humans?

No, the Alligatorfish is harmless to humans.

Is the Alligatorfish edible?

The Alligatorfish is not usually eaten.

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All data

Identification

Dutch name
Alligatorvis inferred
English name
Alligatorfish verified
Scientific name
Aspidophoroides monopterygius
Family
Agonidae
Other names
Aleutian alligatorfish; Alligatorfish; Atlantic alligatorfish verified

Appearance

Size class
Medium verified
Max length (cm)
22.0 verified
Average length (cm)
14.2 verified
Body shape
Elongated (eel-like) verified
Dominant colour
Brown sourced
Pattern
Horizontal stripes sourced
Tail shape
Rounded inferred
Mouth position
Inferior (downward) inferred
Lips
Thick / fleshy inferred
Barbels
No verified
Dorsal fins
One continuous sourced
Dorsal spines
No verified

Habitat & distribution

Water type
Saltwater verified
Substrate
Sand / mud bottom verified
Min depth (m)
0.0 verified
Max depth (m)
695.0 verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Social behaviour
Solitary verified
Territorial
No verified
Activity
Diurnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
No verified

For anglers

Edibility
Not eaten verified
Fishing method
Bodemvissen met natuurlijk aas (worm, garnaal of vis) op of vlak boven de bodem. 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 Aspidophoroides

More from the family Agonidae

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