RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Beaulieu

Largest measured brook lamprey: 13.7 cm

The largest brook lamprey measured in Environment Agency surveys of the River Beaulieu was 13.7 cm, recorded at Buck Hill on 25 September 2009.

Across 75 measured brook lamprey, the median measured length was 11 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 Beaulieu.

See brook lamprey records across England →

Most recent observation29 July 2025Shepton Water · 7 fish
Largest measured brook lamprey
13.7 cm
Median length
11 cm
Fish measured
75
Survey locations
17

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
13.7 cm25 Sept 2009Buck Hill120047
13.3 cm27 Aug 2009Penerley Bridge120589
13 cm3 Aug 2010Matley Passage123895
13 cm27 Aug 2009Penerley Bridge120589
13 cm27 Aug 2009Penerley Bridge120589
12.6 cm27 Aug 2009Penerley Bridge120589
12.5 cm27 Aug 2009Penerley Bridge120589
12.5 cm27 Aug 2009Penerley Bridge120589
12.4 cm25 Sept 2009Buck Hill120047
12.3 cm27 Aug 2009Penerley Bridge120589

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
Shepton Water18 Jul 201329 Jul 20254
Penerley Water - u/s Shepton confluence18 Jul 201329 Jul 20253
Withycombe Shade15 Jul 201323 Jul 20254
Longdown Inclosure Tributary16 Jul 201323 Jul 20253
Holmhill Passage16 Jul 201323 Jul 20253
Mallard Wood15 Jul 201322 Jul 20254
Longwater lawn15 Jul 201322 Jul 20253
Wort's Gutter29 Aug 200721 Jul 20254
Matley Passage21 Aug 200821 Jul 202510
u/s Ashurst Lodge6 Sept 20073 Jul 20244
d/s Holmhill Passage15 Aug 201715 Aug 20171
Hartford Stream - d/s Boarman Pond10 Jul 201710 Jul 20171
North Lane30 Sept 200825 Jul 20132
Penerley Bridge27 Aug 200918 Jul 20133
Buck Hill25 Sept 200925 Sept 20091
Fulliford Bog6 Sept 20076 Sept 20071
Ipley Bridge4 Sept 200123 Aug 20022

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

2001–2025

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 75 measured fish were spread across different length ranges.

Smallest
7.5 cm
Lower quarter
10.3 cm
Median
11 cm
Upper quarter
11.8 cm
Largest
13.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Beaulieu

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

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