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  4. Trout

Species group · Bony fish

Trout

WAnimals has 4 species of trout, in the family Salmonidae.

4 species
1 family
88 countries
109 parks
Weight
300 g – 25.9 kg
Length
18 cm – 1.4 m
Lifespan
5 – 40 years

Ranges calculated from the profiles that record the figure, not from all 4.

All 4 species of trout on WAnimals

Each one has its own full profile. This group does not replace them: it brings them together.

Brown TroutNot Evaluated

Brown Trout

Salmo trutta

81 countries14 parks23 dive sites
Rainbow TroutLeast Concern

Rainbow Trout

Oncorhynchus mykiss

73 countries4 parks9 dive sites
Brook TroutLeast Concern

Brook Trout

Salvelinus fontinalis

39 countries30 parks3 dive sites
Least Concern

Arctic Charr

Salvelinus alpinus

19 countries69 parks7 dive sites

Conservation status

3 Least Concern1 Not Evaluated

No species documented in this group is genuinely at risk according to the IUCN, with the data available today.

Where they live

Recorded in 88 countries. The ones with the most species in the group:

  • Austria4
  • Canada4
  • Denmark4
  • Finland4
  • France4
  • Germany4
  • Ireland4
  • Italy4
  • Norway4
  • Sweden4
  • Switzerland4
  • United Kingdom4
  • United States4
  • Argentina3
  • Australia3
  • Belgium3
  • Bosnia and Herzegovina3
  • Bulgaria3
  • Chile3
  • Croatia3
  • Czechia3
  • Estonia3
  • Iceland3
  • India3

Where to see them

  • Abisko2 species
  • Femundsmarka2 species
  • Fulufjallet2 species
  • Gros Morne2 species
  • Hardangervidda2 species
  • Jotunheimen2 species
  • Thingvellir (Þingvellir)2 species
  • Vatnajokull2 species
  • Acadia1 species
  • Anticosti1 species
  • Apostle Islands1 species
  • Assateague Island1 species
  • Blue Lake (Nelson Lakes)diving
  • Fathom Five National Marine Park (Tobermory)diving
  • Isle Royale National Parkdiving
  • Loch Nessdiving
  • Lofoten (orcas)diving
  • Saltstraumendiving

Did you know…?

  • Some exceptional populations, known as ferox trout, switch to an entirely fish diet and grow far larger and live longer.

    From Brown Trout

  • It feeds on aquatic insects and their larvae, on crustaceans, and — in larger fish — on smaller fish.

    From Brown Trout

  • Some populations are anadromous, migrating between sea and river as sea trout.

    From Brown Trout

  • The steelhead shows a remarkable instinct for returning to its birthplace after 2 to 3 years at sea.

    From Rainbow Trout

  • It eats insects, crustaceans, molluscs and small fish.

    From Rainbow Trout

  • It has been widely introduced around the world for aquaculture and sport fishing.

    From Rainbow Trout

  • It eats insects and their larvae, zooplankton, small crustaceans and fish.

    From Brook Trout

  • It lays its eggs in a redd, a gravel nest dug out by the female.

    From Brook Trout

Ecosystems

  • Freshwater4
  • Ocean1

See every species group · Explore the species one by one

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