RiverFish

River lamprey · Lampetra fluviatilis

River lamprey in the River Wear

Largest measured river lamprey: 32.5 cm

The largest river lamprey measured in Environment Agency surveys of the River Wear was 32.5 cm, recorded at River Wear at Finchale Priory - Eel Site on 30 September 2009.

Across 6 measured river lamprey, the median measured length was 14.6 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Wear.

See river lamprey records across England →

Most recent observation21 August 2011Bedburn Beck at Newhall Farm - Eel Site · 1 fish
Largest measured river lamprey
32.5 cm
Median length
14.6 cm
Fish measured
6
Survey locations
3

Individual EA measurements

Largest measured river lamprey

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
32.5 cm30 Sept 2009River Wear at Finchale Priory - Eel Site121093
30.5 cm30 Sept 2009River Wear at Finchale Priory - Eel Site121093
16 cm13 Aug 2009Bedburn Beck at Newhall Farm - Eel Site121107
13.1 cm21 Aug 2011Bedburn Beck at Newhall Farm - Eel Site127739
13 cm21 Sept 2009River Browney at Malton Picnic Site - Eel Site121097
12 cm21 Sept 2009River Browney at Malton Picnic Site - Eel Site121097

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where river lamprey were found

Each point marks a survey location with at least one river lamprey record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding river lamprey
Bedburn Beck at Newhall Farm - Eel Site13 Aug 200921 Aug 20112
River Wear at Finchale Priory - Eel Site30 Sept 200930 Sept 20091
River Browney at Malton Picnic Site - Eel Site21 Sept 200921 Sept 20091

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

2009–2011

Survey records by year

Each bar shows how many survey visits recorded river lamprey that year.

Fish measured by surveyors

Measured length distribution

See how the 6 measured fish were spread across different length ranges.

Smallest
12 cm
Lower quarter
13 cm
Median
14.6 cm
Upper quarter
26.9 cm
Largest
32.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Wear

Compare other species with enough survey and measurement data for a detailed page.

European eel Brown / sea trout Atlantic salmon Bullhead Minnow Stone loach

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →