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Winter flounder (Pseudopleuronectes americanus) — Pleuronectidae

Winter flounder

Pseudopleuronectes americanus
LC · Least Concern

The Winter flounder (Pseudopleuronectes americanus) is a saltwater fish of the family Pleuronectidae that grows up to 64 cm.

Length
64 cm
Water
Saltwater
Depth
5.0–143.0 m
Diet
Carnivore
Behaviour
Solitary
Activity
Diurnal
Body shape
Flatfish
Substrate
Sand / mud bottom
Danger
Harmless
Range
Northwest Atlantic along the east coast of North America, over sandy and silty bottoms of cold coastal water and estuaries.
Edibility
Highly prized

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Description

The winter flounder is a right-eyed flatfish of the family Pleuronectidae (righteye flounders) reaching about 64 cm. The oval body has both eyes on the right side, a small mouth and a thick, leathery skin; the upper side varies from olive-brown to almost black, matching the bottom. The species lives over sand and mud bottoms of cold coastal water and estuaries along the east coast of North America. In winter it moves into shallow bays and estuaries to spawn, hence its name. On the bottom it searches for worms, small crustaceans, molluscs and small fish. With its tasty flesh it is a popular commercial and sport fish, including for ice fishing.

Frequently asked questions

How do you recognise the Winter flounder?

The Winter flounder has a flatfish-shaped body, is mainly brown and shows a plain pattern. Right-eyed flatfish with a small mouth and thick, leathery skin; the upper side varies from olive-brown to almost black.

Where does the Winter flounder live?

The Winter flounder lives in the sea (marine waters) and is mostly found around sand or mud bottom. Northwest Atlantic along the east coast of North America, over sandy and silty bottoms of cold coastal water and estuaries.

How big does the Winter flounder get?

The Winter flounder grows to a maximum of about 64 cm.

Is the Winter flounder dangerous to humans?

No, the Winter flounder is harmless to humans. None required: this species is harmless to humans.

Is the Winter flounder edible?

Yes, the Winter flounder is a highly prized food fish.

More photos

Winter flounder (Pseudopleuronectes americanus) — Pleuronectidae — 2
iNaturalist ((c) Robbie, some rights reserved (CC BY))
Winter flounder (Pseudopleuronectes americanus) — Pleuronectidae — 3
iNaturalist ((c) guylafond, some rights reserved (CC BY-NC))
Winter flounder (Pseudopleuronectes americanus) — Pleuronectidae — 4
iNaturalist ((c) Alex R, some rights reserved (CC BY-NC))
Winter flounder (Pseudopleuronectes americanus) — Pleuronectidae — 5
Wikimedia Commons — James Alexander Henshall (Public domain)
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All data

Identification

English name
Winter flounder verified
Scientific name
Pseudopleuronectes americanus
Family
Pleuronectidae
Other names
Carrelet; Dab; Flounder; Georges Bank flounder; Sole; Blackback; Lemon sole; Plie rouge verified

Appearance

Size class
Large verified
Max length (cm)
64.0 verified
Body shape
Flatfish verified
Dominant colour
Brown sourced
Pattern
Plain 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
Saltwater verified
Substrate
Sand / mud bottom verified
Min depth (m)
5.0 verified
Max depth (m)
143.0 verified
Natural range
Northwest Atlantic along the east coast of North America, over sandy and silty bottoms of cold coastal water and estuaries. verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Diet (detail)
Worms, small crustaceans, molluscs and small fishes from the bottom sourced
Social behaviour
Solitary verified
Territorial
No verified
Activity
Diurnal inferred
Reproduction
Separate sexes verified
Sexual dimorphism
No verified
levensduur_max_jaar
14.0 verified
Seasonality
Migrates in winter to shallow bays and estuaries to spawn (hence 'winter flounder'); the eggs sink and stick to the bottom. sourced
Special features
Right-eyed flatfish with a small mouth and thick, leathery skin; the upper side varies from olive-brown to almost black. sourced

For anglers

Edibility
Highly prized verified
Fishing method
Bottom fishing with lugworm or shrimp over soft bottoms in bays and estuaries; a popular coastal and ice-fishing species sourced
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 Pseudopleuronectes

More from the family Pleuronectidae

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