RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Cuckmere

Largest measured brook lamprey: 18 cm

The largest brook lamprey measured in Environment Agency surveys of the River Cuckmere was 18 cm, recorded at Upstream Tumblers Gate on 27 August 2021.

Across 40 measured brook lamprey, the median measured length was 12.1 cm.

Surveyors recorded weights for 2 brook lamprey. The median was 0.1 oz (0.0025 kg) and the largest recorded weight was 0.1 oz (0.003 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Cuckmere.

See brook lamprey records across England →

Most recent observation8 November 2024Michelham Priory Road Bridge Downstream · 1 fish
Largest measured brook lamprey
18 cm
Median length
12.1 cm
Fish measured
40
Survey locations
8

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 cm27 Aug 2021Upstream Tumblers Gate160175
15.5 cm20 Oct 2009Michelham Priory120704
15 cm28 Aug 2024Horselunges Bridge166931
15 cm20 Oct 2009Horselunges Bridge120663
14.5 cm20 Oct 2009Horselunges Bridge120663
14.2 cm20 Oct 2009Michelham Priory120704
14 cm2 Nov 2010Sessingham Farm125013
14 cm20 Oct 2009Horselunges Bridge120663
13.7 cm20 Oct 2009Michelham Priory120704
13.5 cm28 Aug 2024Horselunges Bridge166931

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
Michelham Priory Road Bridge Downstream8 Nov 20248 Nov 20241
Horselunges Bridge20 Aug 200828 Aug 20246
Upstream Tumblers Gate27 Aug 202127 Aug 20211
Michelham Priory20 Oct 200919 Sept 20184
Sheepwash Bridge17 Sept 201817 Sept 20181
Mill Bridge10 Sept 201310 Sept 20131
Sessingham Farm2 Nov 20102 Nov 20101
Sherman Bridge16 Sept 200816 Sept 20081

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

2008–2024

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
6 cm
Lower quarter
11 cm
Median
12.1 cm
Upper quarter
13.5 cm
Largest
18 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 2 brook lamprey. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.002 kg)
Lower quarter
0.1 oz (0.0022 kg)
Median
0.1 oz (0.0025 kg)
Upper quarter
0.1 oz (0.0028 kg)
Heaviest
0.1 oz (0.003 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Cuckmere

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

Chub Roach European eel Gudgeon Perch Pike

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 →