RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Yare

Largest measured brook lamprey: 20.1 cm

The largest brook lamprey measured in Environment Agency surveys of the River Yare was 20.1 cm, recorded at Downstream Bawburgh Bridge on 2 August 2023.

Across 8 measured brook lamprey, the median measured length was 14.1 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 Yare.

See brook lamprey records across England →

Most recent observation17 August 2023Uea · 1 fish
Largest measured brook lamprey
20.1 cm
Median length
14.1 cm
Fish measured
8
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
20.1 cm2 Aug 2023Downstream Bawburgh Bridge164150
15.2 cm17 Aug 2023Uea164136
15.2 cm13 Jul 2017Upstream Barford Bridge152350
14.2 cm1 Aug 2017Uea152384
14 cm7 Jun 2019Marlingford156005
13.9 cm2 Aug 2023Downstream Bawburgh Bridge164150
13.1 cm16 Aug 2023Cooper Lane164127
13 cm4 Nov 2020Marlingford159848

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
Uea1 Aug 201717 Aug 20232
Cooper Lane16 Aug 202316 Aug 20231
Downstream Bawburgh Bridge3 Oct 19952 Aug 20232
Marlingford7 Jun 20194 Nov 20202
Upstream Barford Bridge13 Jul 201713 Jul 20171
Upstream Bickerstone Bridge17 Mar 198717 Mar 19871
Bowthorpe16 Feb 198716 Feb 19871
Upstream Cringleford Bridge13 Feb 198713 Feb 19871

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

1987–2023

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 8 measured fish were spread across different length ranges.

Smallest
13 cm
Lower quarter
13.7 cm
Median
14.1 cm
Upper quarter
15.2 cm
Largest
20.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Yare

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

Pike European eel Roach Dace Chub Perch

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 →