RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Piall

Largest measured brook lamprey: 14.3 cm

The largest brook lamprey measured in Environment Agency surveys of the River Piall was 14.3 cm, recorded at Lutton on 14 July 2014.

Across 40 measured brook lamprey, the median measured length was 10.7 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 Piall.

See brook lamprey records across England →

Most recent observation31 July 2025u/s Marks Bridge · 2 fish
Largest measured brook lamprey
14.3 cm
Median length
10.7 cm
Fish measured
40
Survey locations
2

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
14.3 cm14 Jul 2014Lutton141701
13.5 cm26 Jul 2018u/s Marks Bridge152984
13.2 cm26 Jul 2018u/s Marks Bridge152984
13.2 cm13 Jul 2016u/s Marks Bridge148691
13 cm8 Sept 2010u/s Marks Bridge123814
12.5 cm13 Jul 2016u/s Marks Bridge148691
12 cm31 Jul 2025u/s Marks Bridge179016
12 cm26 Jul 2018u/s Marks Bridge152984
12 cm26 Jul 2018u/s Marks Bridge152984
12 cm26 Jul 2018u/s Marks Bridge152984

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
u/s Marks Bridge6 Jul 200931 Jul 20259
Lutton14 Jul 201414 Jul 20141

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

2009–2025

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 40 measured fish were spread across different length ranges.

Smallest
4.4 cm
Lower quarter
9.4 cm
Median
10.7 cm
Upper quarter
12 cm
Largest
14.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Piall

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

Brown / sea trout Bullhead European eel Atlantic salmon

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 →