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A side view of an Atlantic salmon with a silvery body, scattered dark spots and a forked tail. Real photograph
Real photograph Timothy Knepp / U.S. Fish and Wildlife Service, public domain, via Wikimedia Commons · Public domain (US Government work)

Atlantic salmon

Salmo salar

say it at-LAN-tik SAM-un

Why we love them

The Atlantic salmon is a big, strong, silvery fish that lives in the cold northern Atlantic Ocean and in the rivers that flow into it. It is one of the largest fish in the salmon family and can grow up to about a metre long, which is roughly the length of a baseball bat.

Atlantic salmon have one of the most amazing journeys of any animal. They hatch as tiny babies in freshwater rivers, then swim all the way out to the sea to find food and grow big and fat. After a year or two in the ocean, they turn around and travel the long way back to the very same river where they were born to lay their own eggs.

To feed and grow, salmon are hunters. Young ones in the river snap up insects and tiny creatures, and out at sea the grown fish eat smaller fish and other sea animals. They grow much faster in the ocean, where there is far more food to catch.

Something special about Atlantic salmon is that they do not always die after laying their eggs. Many kinds of salmon only get to lay eggs once, but an Atlantic salmon can sometimes rest, swim back to the sea, and make the great journey again another year.

Sadly, there are far fewer Atlantic salmon than there used to be, and experts now list them as “near threatened,” meaning their numbers are falling and they could be in trouble soon. Dams that block rivers, too much fishing, dirty water, and warming seas all make life hard for them. People are helping by removing old dams and cleaning up rivers so the salmon can find their way home.

My home

River, ocean, coastal waters

Where I live

Europe, North America, Atlantic Ocean

What I eat

Insects, small fish, crustaceans

How long I am

0.7–1 m

How heavy I am

3.6–13.6 kg

How long I live

4–6 years

Atlantic salmon are born in rivers, swim out to the sea to grow big, and then travel all the way back to the same river to lay their eggs.

After 2 years in the ocean, a salmon can grow to about the length of a baseball bat and heavier than a big house cat.

Unlike Pacific salmon, an Atlantic salmon does not always die after laying its eggs and can sometimes make the long trip more than once.

Every atlantic salmon can feel happy, scared and loved — just like you.

Looking after my friends

Worth watching

They are doing okay, but people keep a careful eye on them so they stay safe.

You can help by learning their names, keeping wild places clean, and telling someone why this animal matters.

Official status: near threatened (IUCN)

Where this came from