Animal · Sweden, Finland, Russia
Northern pike
Esox lucius — the name this animal has in the language scientists everywhere share.
The northern pike is a long, green predator fish that hides among water plants and shoots out to snatch passing fish. It can grow longer than a child is tall, and its jaws are full of small, backward-pointing teeth. Pike live in lakes and slow rivers right across the northern half of the world.



Picture credit: Karelj (Public domain) · Georg Mittenecker (CC BY-SA 2.5) · Peter Kölbl (CC BY-SA 3.0) · Wikimedia Commons
Where does the northern pike live?
Home: Weedy lakes and slow rivers across Europe, northern Asia and North America.
In the wild it lives in these countries: Sweden, Finland, Russia, Germany, Poland, Canada, the United States.
Conservation status from the IUCN: not in danger.
The short profile
Fully grown: usually 40–55 cm long, up to about 1.5 m. It weighs about 3 kilograms. On the menu: meat.
The story behind it
A pike spends much of its day doing almost nothing. It hangs among reeds and water weed, its green and cream markings breaking up its outline until it looks like another stem. When a roach or a perch swims past, the pike bends its body into an S and straightens it like a released spring, covering the last half metre in a blink. Its mouth is wide and flat like a duck's bill, and inside are rows of small teeth that all point backwards, so a struggling fish only slides deeper in. Pike swallow their catch head first, then rest for hours while it digests. In spring they move into flooded grass and shallow bays to lay their eggs, sometimes tens of thousands of them, which stick to the plants. The young hatch after about two weeks and start on tiny water fleas before they begin hunting fish of their own. Big pike are almost always female, and the males stay smaller.
Find it on the globe
Northern pike is there as a tiny animated figure that breathes and looks around. From far away the planet is only a blue ball; detail arrives as you zoom in, and this one appears once you are close enough. Open it on the globe.
It sits at its real coordinates, not near them — the same numbers listed in the facts above. Switch off the layer for this kind of place and it disappears again; the buttons for that are down the right-hand edge.
Questions children ask
Are pike dangerous to people?
No. A pike hunts fish, frogs and sometimes a duckling, not swimmers. Anglers still wear a glove when they unhook one, because the teeth and the edges of the gills are sharp.
Why is a pike green and stripy?
The pale bars along its sides copy the light and shadow between water plants. A fish swimming past sees stems, not a hunter, until it is far too close.
Do pike eat each other?
Yes, quite often. A young pike in a crowded bay will take a smaller pike, which is one reason they spread out as they grow bigger.
Where these numbers come from
Every figure on this page was checked against public reference sources before publication. Where sources genuinely disagree, the text says so.
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