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River lamprey

Lampetra fluviatilis

River lamprey© FishBase (CC BY-NC)

The River lamprey (Lampetra fluviatilis) is a jaw‑less, parasitic fish that climbs freshwater rivers to spawn. It is prized by anglers for its unique behavior rather than sport, and is seldom targeted for food.

Fight
Taste
Poisonous

Basic Information

Family

Petromyzontidae

Max Size

50 cm

Habitat

marine, freshwater, brackish

Climate

temperate

Best Season

Spring (March–May) and early summer (June) during upstream migration

Best Time

Dusk to night

Distribution

Select a map type to show distribution on the globe.

Fishing Tips for River lamprey

  • Use a light‑weight spinning rod with a small hook (size 8‑12).
  • Present live bait such as minnows or nightcrawlers near the river bottom during low light.
  • Fish in shallow, fast‑flowing runs where lampreys congregate during spawning runs.
  • Use a slow drift or bottom‑bounce technique and keep line slack to allow the lamprey to take the bait.

Top Fishing Locations for River lamprey

beginner78% Very Common

Renowned for large runs of sea lampreys and river lampreys during autumn migrations, with accessible banks and well‑known fishing spots near Aberfeldy.

Best: September–October

intermediate65% Common

A prime river lamprey destination where anglers target the species during spring spawning runs, with clear waters and good access points near Brecon.

Best: March–April

intermediate55% Common

The longest river in the UK hosts sizable lamprey migrations in autumn; popular among local anglers for its varied habitats.

Best: September–November

River Neman

Lithuania/Poland
expert42% Occasional

Flows through a mix of forested valleys; lampreys gather in late spring, offering a rewarding yet slightly more remote experience.

Best: April–May

River Daugava

Latvia
beginner35% Occasional

Known for consistent lamprey runs in early autumn; accessible from Riga with several public fishing banks.

Best: September–October

River Loire

France
expert22% Uncommon

Southern sections of the Loire host occasional lamprey migrations; a bucket‑list spot for dedicated anglers willing to travel off the beaten path.

Best: April–May

Market Prices

Recommended Fishing Equipment for River lamprey

Recommended Equipment

RodMedium‑light spinning rod, fast action
Line6–10 lb test monofilament or fluorocarbon
Lure TypeSmall soft‑plastic grubs or minnow‑sized spinnerbaits
TechniqueDrift or bottom‑bounce fishing near spawning runs during dusk/night

Best bait: Live minnows, nightcrawlers, or fish eggs