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Esocidae / Freshwater + Brackish

Northern pike.

Esox luciusLinnaeus, 1758

An ambush predator of weedy lakes and slow rivers, built almost entirely for one thing: the sudden lunge.

LCLeast Concern
Esox lucius, “Der Hecht”. Hand-coloured copper engraving, pl. 32.
Esox lucius, “Der Hecht”. Hand-coloured copper engraving, pl. 32.Source & licence ↗
Distribution

Where to find it.

Circumpolar across the northern hemisphere: Europe, northern Asia and North America. Also in the brackish bays of the Baltic.

Also known as Pike, Jack.

01 / appearance

A closer look.

Long, torpedo-shaped body with the dorsal and anal fins set far back near the tail, which gives the fish its explosive acceleration. The flat, duck-bill snout holds large fangs in the lower jaw and rows of backward-pointing teeth on the roof of the mouth. Green-brown flanks with pale spots make it nearly invisible among water plants.

02 / behaviour

How it lives.

Pike are solitary and hunt mostly by sight. They hang motionless in the weeds and strike at passing prey from a standstill, relying on eyesight and the lateral line. Cannibalism is common, especially among young fish.

03 / reproduction

The next generation.

Spawning takes place in early spring, often just after the ice melts, in shallow vegetated margins and flooded meadows. Females grow considerably larger than males.

04 / conservation

Conservation

Not threatened globally. Local populations suffer where floodplains and reed beds that serve as spawning grounds are drained or built over.

Least Concern — global IUCN assessment dated 15 July 2022. Regional populations can have a different status. View the Red List record ↗

A few more things

In the margins.

  • One of very few freshwater fish native to both Europe and North America.
  • In the Baltic it lives in brackish water, sharing the coast with marine species.
Sources & image credit

FishBase — Esox lucius ↗
IUCN Red List — assessment ↗

M. E. Bloch, Ichthyologie, ou Histoire naturelle des poissons, pl. 32. Public domain ↗. Reproduced as resized WebP files.