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Atlantic salmon (Salmo salar) — Salmonidae

Atlantic salmon

Salmo salar
Family: Salmonidae
NT · Near Threatened
NativeIntroduced

The Atlantic salmon (Salmo salar) is a fish that lives in both fresh and salt water of the family Salmonidae that grows up to 150 cm.

Length
150 cm
Water
Euryhaline
Depth
0–210 m
Diet
Carnivore
Behaviour
Schooling
Activity
Diurnal
Body shape
Torpedo-shaped
Substrate
Mixed bottom
Danger
Harmless
Range
North Atlantic; anadromous, spawns in cool, fast-flowing rivers of Western Europe and eastern North America.
Edibility
Highly prized

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Description

The Atlantic salmon is a large, powerful salmonid of the family Salmonidae reaching about 150 cm. The streamlined body bears an adipose fin between the dorsal and tail fins and is silvery with black spots; in the spawning season river fish turn brownish to reddish and males develop a hooked lower jaw. The salmon is anadromous: it grows up in cool, fast-flowing rivers, migrates to the North Atlantic to grow and after years returns to its native river to spawn, leaping waterfalls and weirs on the way. At sea it hunts herring-like fish and squid. Through dams, pollution and climate change many populations have declined sharply; the species is now assessed as Near Threatened (NT).

Frequently asked questions

How do you recognise the Atlantic salmon?

The Atlantic salmon has a torpedo-shaped body, is mainly silver-grey and shows a spots pattern. Salmonid with an adipose fin and small black spots; migrates from the sea up the rivers to spawn, leaping up waterfalls and weirs on the way.

Where does the Atlantic salmon live?

The Atlantic salmon lives in both fresh and salt water and is mostly found around mixed bottom. North Atlantic; anadromous, spawns in cool, fast-flowing rivers of Western Europe and eastern North America.

How big does the Atlantic salmon get?

The Atlantic salmon grows to a maximum of about 150 cm. On average the species is around 38 cm.

Is the Atlantic salmon dangerous to humans?

No, the Atlantic salmon is harmless to humans. None required: this species is harmless to humans.

Is the Atlantic salmon edible?

Yes, the Atlantic salmon is a highly prized food fish.

More photos

Atlantic salmon (Salmo salar) — Salmonidae — 2
Wikimedia Commons — Rupert Fleetingly (CC BY-SA 2.0)
Atlantic salmon (Salmo salar) — Salmonidae — 3
iNaturalist ((c) v_moss, some rights reserved (CC BY-NC))
Atlantic salmon (Salmo salar) — Salmonidae — 4
iNaturalist ((c) Kathy Webb + Bill Depew, some rights reserved (CC BY-NC), uploaded by Kathy Webb + Bill Depew)
Atlantic salmon (Salmo salar) — Salmonidae — 5
iNaturalist (no rights reserved)

Easily confused with

These species look like the Atlantic salmon and live in the same waters.

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All data

Identification

English name
Atlantic salmon verified
Scientific name
Salmo salar
Family
Salmonidae
Other names
Atlantic salmon; Salmon; Grilse; Parr; Bay salmon; Black salmon; Breeder; Caplin-scull salmon; Common Atlantic salmon; Fiddler; Grayling; Grilt verified

Appearance

Size class
Extra large verified
Max length (cm)
150 verified
Average length (cm)
38 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Silver / grey sourced
Pattern
Spots sourced
Tail shape
Straight
Mouth position
Terminal
Lips
Thin
Barbels
No verified
Dorsal fins
One continuous sourced
Dorsal spines
No verified

Habitat & distribution

Water type
Euryhaline verified
Substrate
Mixed bottom sourced
Min depth (m)
0 verified
Max depth (m)
210 verified
Natural range
North Atlantic; anadromous, spawns in cool, fast-flowing rivers of Western Europe and eastern North America. verified
Origin
Native verified

Behaviour & biology

Diet
Carnivore verified
Diet (detail)
Insects and crustaceans (when young in the river); herring-like fishes, sprat and squid (at sea) sourced
Social behaviour
Schooling verified
Territorial
No verified
Activity
Diurnal
Reproduction
Separate sexes verified
Sexual dimorphism
No verified
Max. age (years)
13 verified
Seasonality
Anadromous: the adults migrate up the rivers to spawn on gravel in autumn and winter; young salmon grow up in the river for years before migrating to sea. sourced
Special features
Salmonid with an adipose fin and small black spots; migrates from the sea up the rivers to spawn, leaping up waterfalls and weirs on the way. sourced

For anglers

Edibility
Highly prized verified
Fishing method
Fly fishing and spinning in rivers during the upstream run; strictly regulated, often subject to mandatory catch and release sourced
Regulations source

Safety

Danger to humans
Harmless sourced
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 Salmo

More from the family Salmonidae

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