RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Leadon

Largest measured brook lamprey: 22 cm

The largest brook lamprey measured in Environment Agency surveys of the River Leadon was 22 cm, recorded at Highnam on 18 March 1997.

Across 37 measured brook lamprey, the median measured length was 16 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 Leadon.

See brook lamprey records across England →

Most recent observation2 August 2017d/s Upleadon Bridge · 1 fish
Largest measured brook lamprey
22 cm
Median length
16 cm
Fish measured
37
Survey locations
12

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
22 cm18 Mar 1997Highnam24623
18 cm7 Sept 2012Ketford Bridge133438
18 cm3 Mar 1992Pauntley Court55013
17.7 cm22 Sept 2009Old Wharf119074
17.5 cm24 Sept 2009Ketford Bridge119088
17.5 cm5 Sept 2005Durbridge Mill85941
17 cm7 Sept 2012Ketford Bridge133438
17 cm20 May 2002Cutmill Farm50160
17 cm17 May 2002Uplands Bridge50165
17 cm2 Sept 1996Ketford Bridge53533

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
d/s Upleadon Bridge2 Aug 20172 Aug 20171
Ketford Bridge2 Sept 19967 Sept 20124
Old Wharf22 Sept 200922 Sept 20091
Durbridge Mill15 Aug 20035 Sept 20052
Upleadon5 Apr 197823 Sept 20045
Cutmill Farm20 May 200220 May 20021
Uplands Bridge17 May 200217 May 20021
Highnam18 Mar 199718 Mar 19971
Wellington Heath22 Jul 199622 Jul 19961
Dymock22 Jul 199622 Jul 19961
Pauntley Court3 Mar 19923 Mar 19921
Rudford30 Sept 198630 Sept 19861

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

1978–2017

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 37 measured fish were spread across different length ranges.

Smallest
10 cm
Lower quarter
15 cm
Median
16 cm
Upper quarter
17 cm
Largest
22 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Leadon

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

European eel Stone loach Minnow Brown / sea trout Bullhead 3-spined stickleback

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 →