RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Trent

Largest measured brook lamprey: 18.5 cm

The largest brook lamprey measured in Environment Agency surveys of the River Trent was 18.5 cm, recorded at Staffordshire University, Stoke on 3 June 2025.

Across 19 measured brook lamprey, the median measured length was 13.2 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 Trent.

See brook lamprey records across England →

Most recent observation3 June 2025Staffordshire University, Stoke · 2 fish
Largest measured brook lamprey
18.5 cm
Median length
13.2 cm
Fish measured
19
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
18.5 cm3 Jun 2025Staffordshire University, Stoke177313
17.2 cm27 Sept 2010Sandy Point124135
16 cm18 Aug 2011Norton Green127747
15 cm4 Jun 2024Staffordshire University, Stoke167955
15 cm18 Aug 2011Norton Green127747
14.5 cm18 Aug 2011Norton Green127747
14.1 cm18 Aug 2011Norton Green127747
14 cm4 Jun 2024Staffordshire University, Stoke167955
13.5 cm18 Aug 2011Norton Green127747
13.2 cm18 Aug 2011Norton Green127747

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
Staffordshire University, Stoke4 Jun 20243 Jun 20252
Norton Green18 Aug 201118 Aug 20111
Sandy Point27 Sept 201027 Sept 20101
Ball Green4 Sept 20034 Sept 20031

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

2003–2025

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 19 measured fish were spread across different length ranges.

Smallest
9 cm
Lower quarter
12.2 cm
Median
13.2 cm
Upper quarter
14.8 cm
Largest
18.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Trent

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

Chub Roach Dace Gudgeon Perch 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 →