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Stone sculpin (Paracottus knerii) — Cottocomephoridae

Stone sculpin

Paracottus knerii
LC · Least Concern

The Stone sculpin (Paracottus knerii) is a freshwater fish of the family Cottocomephoridae that grows up to 14 cm.

Length
14.4 cm
Water
Freshwater
Depth
0–100.0 m
Diet
Carnivore
Behaviour
Solitary
Activity
Nocturnal
Body shape
Irregular
Substrate
Stone or rock
Danger
Harmless
Range
Fresh water of Lake Baikal and adjoining rivers in Siberia, on stony and rocky bottoms of shallow to medium-deep water.
Edibility
Not eaten

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Description

The stone sculpin is a stocky freshwater sculpin of the family Cottocomephoridae reaching about 14 cm. Characteristic are the large, broad head and the broad, fan-shaped pectoral fins with which the fish presses against the bottom; the brown-mottled, scaleless body blends well among stones. The species lives on stone and rock bottoms of shallow to moderate water of Lake Baikal and adjacent rivers in Siberia, and is one of the most common bottom fish of the lake. As an ambush predator it seizes insect larvae, small crustaceans such as amphipods and fish eggs. In spring the male guards the eggs laid under a stone until they hatch. Because of its small size it has no fishery importance, but it is an important prey for predatory fish.

Frequently asked questions

How do you recognise the Stone sculpin?

The Stone sculpin has an irregular in shape body, is mainly brown and shows a marbled pattern. Stocky freshwater sculpin with a large, broad head and fan-shaped pectoral fins; brown marbled for camouflage among stones.

Where does the Stone sculpin live?

The Stone sculpin lives in fresh water and is mostly found around stony or rocky ground. Fresh water of Lake Baikal and adjoining rivers in Siberia, on stony and rocky bottoms of shallow to medium-deep water.

How big does the Stone sculpin get?

The Stone sculpin grows to a maximum of about 14 cm. On average the species is around 8 cm.

Is the Stone sculpin dangerous to humans?

No, the Stone sculpin is harmless to humans. None required: this species is harmless to humans.

Is the Stone sculpin edible?

The Stone sculpin is not usually eaten.

More photos

Stone sculpin (Paracottus knerii) — Cottocomephoridae — 2
iNaturalist ((c) Roman A. Lagazyuk (Роман А. Лагазюк), some rights reserved (CC BY))
Stone sculpin (Paracottus knerii) — Cottocomephoridae — 3
iNaturalist ((c) noyablokov, some rights reserved (CC BY-NC))
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All data

Identification

English name
Stone sculpin verified
Scientific name
Paracottus knerii
Family
Cottocomephoridae
Other names
Stone sculpin verified

Appearance

Size class
Small verified
Max length (cm)
14.4 verified
Average length (cm)
8.0 verified
Body shape
Irregular verified
Dominant colour
Brown sourced
Pattern
Marbled sourced
Tail shape
Rounded inferred
Mouth position
Terminal inferred
Lips
Thick / fleshy inferred
Barbels
No verified
Dorsal fins
Two separate sourced
Dorsal spines
Yes verified

Habitat & distribution

Water type
Freshwater verified
Substrate
Stone or rock verified
Max depth (m)
100.0 verified
Natural range
Fresh water of Lake Baikal and adjoining rivers in Siberia, on stony and rocky bottoms of shallow to medium-deep water. verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Diet (detail)
Insect larvae, small crustaceans (amphipods) and fish eggs sourced
Social behaviour
Solitary verified
Territorial
Yes verified
Activity
Nocturnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
No verified
Seasonality
Bottom-dweller of stony bottoms; the male guards the eggs laid under a stone. sourced
Special features
Stocky freshwater sculpin with a large, broad head and fan-shaped pectoral fins; brown marbled for camouflage among stones. sourced

For anglers

Edibility
Not eaten verified
Fishing method
Not a target species for angling; at most an incidental catch or usable as baitfish. 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

More from the family Cottocomephoridae

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