RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Main Claw

Largest measured brook lamprey: 15 cm

The largest brook lamprey measured in Environment Agency surveys of the River Main Claw was 15 cm, recorded at Tetcott Bridge on 15 June 2010.

Across 39 measured brook lamprey, the median measured length was 12.5 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 Claw.

See brook lamprey records across England →

Most recent observation9 June 2022Upstream Tetcott Bridge · 5 fish
Largest measured brook lamprey
15 cm
Median length
12.5 cm
Fish measured
39
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
15 cm15 Jun 2010Tetcott Bridge122456
14.5 cm20 May 2016Claw Bridge148057
14.5 cm15 Jun 2010Tetcott Bridge122456
14.5 cm3 Jun 2010Claw Bridge122439
14.3 cm26 May 2022Claw Bridge161382
14 cm26 May 2022Claw Bridge161382
13.8 cm26 May 2022Claw Bridge161382
13.7 cm26 May 2022Claw Bridge161382
13.6 cm3 Jun 2010Claw Bridge122439
13.5 cm9 Jun 2022Upstream Tetcott Bridge161705

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
Upstream Tetcott Bridge9 Jun 20229 Jun 20221
Clawton Bridge15 Jul 20089 Jun 20223
Claw Bridge3 Jun 201026 May 20223
Tetcott Bridge15 Jun 201015 Jun 20101

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

2008–2022

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 39 measured fish were spread across different length ranges.

Smallest
5.1 cm
Lower quarter
10.9 cm
Median
12.5 cm
Upper quarter
13.5 cm
Largest
15 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Claw

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

Bullhead Stone loach Minnow Atlantic salmon Brown / sea trout 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 →