RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Main Kensey

Largest measured brook lamprey: 14.5 cm

The largest brook lamprey measured in Environment Agency surveys of the River Main Kensey was 14.5 cm, recorded at Egloskerry on 2 August 2024.

Across 157 measured brook lamprey, the median measured length was 10.3 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 Main Kensey.

See brook lamprey records across England →

Most recent observation2 August 2024Egloskerry · 6 fish
Largest measured brook lamprey
14.5 cm
Median length
10.3 cm
Fish measured
157
Survey locations
4

Individual EA measurements

Largest measured brook lamprey

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

LengthSurvey dateSurvey locationSurvey ID
14.5 cm2 Aug 2024Egloskerry166926
14 cm2 Aug 2024Egloskerry166926
14 cm5 Aug 2022Egloskerry161665
13.1 cm28 Jul 2016Badgall148705
12.8 cm28 Jul 2016Badgall148705
12.6 cm28 Jul 2016Badgall148705
12.5 cm5 Aug 2022Egloskerry161665
12.5 cm13 Jul 2022Badgall161707
12.5 cm28 Jul 2016Badgall148705
12.4 cm2 Aug 2024Egloskerry166926

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

Explore the river

Where brook lamprey were found

Each point marks a survey location with at least one brook 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 brook lamprey
Egloskerry15 Jul 20082 Aug 202411
Badgall23 Aug 201013 Jul 20223
Trewithick5 Aug 201029 Jun 20223
St. Leonards2 Sept 20094 Sept 20134

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

2008–2024

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 157 measured fish were spread across different length ranges.

Smallest
4.4 cm
Lower quarter
8.8 cm
Median
10.3 cm
Upper quarter
11.3 cm
Largest
14.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Kensey

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

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

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 →