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Sterlet (Acipenser ruthenus) — Acipenseridae

Sterlet

Acipenser ruthenus
Family: Acipenseridae
EN · Endangered

The Sterlet (Acipenser ruthenus) is a freshwater fish of the family Acipenseridae that grows up to 125 cm.

Length
125 cm
Water
Freshwater
Depth
1.0–? m
Diet
Carnivore
Behaviour
Small groups
Activity
Nocturnal
Body shape
Elongated (eel-like)
Substrate
Sand / mud bottom
Danger
Harmless
Edibility
Highly prized

Description

The sterlet is the smallest sturgeon in Europe; this ancient, cartilage-rich fish of the family Acipenseridae reaches about 1.25 metres. Instead of scales the elongate body bears five rows of bony plates. The pointed snout has fringed barbels in front of a protrusible, inferior mouth, with which the fish probes the bottom for insect larvae, worms, shellfish and small crustaceans. Unlike most sturgeons the sterlet is almost entirely confined to fresh water and lives in the large rivers of central and eastern Europe through to Siberia. It grows slowly and matures late; through dams, pollution and fishing for its caviar the wild populations have declined sharply and it is assessed as Endangered (EN). It is, however, widely farmed.

Frequently asked questions

How do you recognise the Sterlet?

The Sterlet has an elongate, eel-like body, is mainly brown and shows a plain pattern.

Where does the Sterlet live?

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

How big does the Sterlet get?

The Sterlet grows to a maximum of about 125 cm. On average the species is around 40 cm.

Is the Sterlet dangerous to humans?

No, the Sterlet is harmless to humans.

Is the Sterlet edible?

Yes, the Sterlet is a highly prized food fish.

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All data

Identification

Dutch name
Sterlet verified
English name
Sterlet verified
Scientific name
Acipenser ruthenus
Family
Acipenseridae
Other names
Sterlet verified

Appearance

Size class
Extra large verified
Max length (cm)
125.0 verified
Average length (cm)
40.0 verified
Body shape
Elongated (eel-like) sourced
Dominant colour
Brown sourced
Pattern
Plain sourced
Tail shape
Crescent (lunate) inferred
Mouth position
Inferior (downward) inferred
Lips
Thick / fleshy inferred
Barbels
Yes verified
Dorsal fins
One continuous sourced
Dorsal spines
No verified

Habitat & distribution

Water type
Freshwater verified
Substrate
Sand / mud bottom sourced
Min depth (m)
1.0 verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Social behaviour
Small groups verified
Territorial
No verified
Activity
Nocturnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
No verified
levensduur_max_jaar
20.0 verified

For anglers

Edibility
Highly prized verified
Fishing method
In de vrije natuur beschermd en kwetsbaar; wordt wel in vijvers en de aquacultuur gehouden voor vlees en kaviaar (gericht bevissen in het wild vaak verboden) 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 Acipenser

More from the family Acipenseridae

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