RiverFish

River lamprey · Lampetra fluviatilis

River lamprey in the River Wear

Largest measured river lamprey: 15.9 cm

The largest river lamprey measured in Environment Agency surveys of the River Wear was 15.9 cm, recorded at River Browney at West Buttsfield on 12 July 2011.

Across 76 measured river lamprey, the median measured length was 11 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 observation13 August 2012Pan burn at Partridge Close · 1 fish
Largest measured river lamprey
15.9 cm
Median length
11 cm
Fish measured
76
Survey locations
10

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
15.9 cm12 Jul 2011River Browney at West Buttsfield129175
15.2 cm12 Jul 2011River Browney at West Buttsfield129175
15 cm11 Aug 2012River Wear at Page Bank132742
14 cm11 Aug 2012River Wear at Page Bank132742
14 cm11 Aug 2012River Wear at Page Bank132742
13.9 cm12 Jul 2011River Browney at West Buttsfield129175
13.6 cm12 Jul 2011River Browney at West Buttsfield129175
13.5 cm13 Aug 2012Pan burn at Partridge Close132782
13.5 cm9 Aug 2012River Browney at Wall Nook132745
13.2 cm9 Aug 2012River Browney at Partridge Close132746

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
Pan burn at Partridge Close13 Aug 201213 Aug 20121
River Wear at Page Bank11 Aug 201211 Aug 20121
River Wear at Croxdale11 Aug 201211 Aug 20121
River Browney at Wall Nook9 Aug 20129 Aug 20121
River Browney at Partridge Close9 Aug 20129 Aug 20121
River Deerness at Langley Moor13 Jul 201113 Jul 20111
River Browney at West Buttsfield12 Jul 201112 Jul 20111
River Browney at Square House12 Jul 201112 Jul 20111
River Browney at Hythe12 Jul 201112 Jul 20111
Rippon Burn11 Jul 201111 Jul 20111

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

2011–2012

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 76 measured fish were spread across different length ranges.

Smallest
3.5 cm
Lower quarter
8.6 cm
Median
11 cm
Upper quarter
12.5 cm
Largest
15.9 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.

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

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 →