Brook lamprey · Lampetra planeri

Brook lamprey in the River Teise

Largest measured brook lamprey: 15.5 cm

The largest brook lamprey measured in Environment Agency surveys of the River Teise was 15.5 cm, recorded at Strawberry Fields on 5 June 2023.

Across 15 measured brook lamprey, the median measured length was 13.5 cm.

Surveyors recorded weights for 9 brook lamprey. The median was 0.1 oz (0.003 kg) and the largest recorded weight was 0.2 oz (0.005 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 Teise.

See brook lamprey records across England →

Most recent observation7 August 2025Higham Farm u/s Sewers Bridge · 2 fish

Largest measured brook lamprey: 15.5 cm
Median length: 13.5 cm
Fish measured: 15
Survey locations: 4

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.

Length	Survey date	Survey location	Survey ID
15.5 cm	5 Jun 2023	Strawberry Fields	162612
15.5 cm	5 Jun 2023	Strawberry Fields	162612
15 cm	16 Sept 2004	Sheephurst Lane	83044
15 cm	18 Aug 2004	Strawberry Fields	82945
15 cm	18 Aug 2004	Strawberry Fields	82945
14.2 cm	5 Jun 2023	Strawberry Fields	162612
13.5 cm	7 Aug 2025	Higham Farm u/s Sewers Bridge	178691
13.5 cm	9 Aug 2017	Higham Farm u/s Sewers Bridge	151186
13 cm	18 Aug 2004	Strawberry Fields	82945
12 cm	18 Aug 2004	Strawberry Fields	82945

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 surveyed	First recorded	Last recorded	Visits finding brook lamprey
Higham Farm u/s Sewers Bridge	9 Aug 2017	7 Aug 2025	2
Strawberry Fields	18 Aug 2004	5 Jun 2023	2
Share Farm	2 Sept 2010	2 Sept 2010	1
Sheephurst Lane	16 Sept 2004	16 Sept 2004	1

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

2004–2025

Survey records by year

Each bar shows how many survey visits recorded brook lamprey that year.

204

005

006

007

008

009

110

011

012

013

014

015

016

117

018

019

020

021

022

123

024

125

Fish measured by surveyors

Measured length distribution

See how the 15 measured fish were spread across different length ranges.

Smallest: 10 cm
Lower quarter: 11.6 cm
Median: 13.5 cm
Upper quarter: 15 cm
Largest: 15.5 cm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 9 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 (0.002 kg)
Median: 0.1 oz (0.003 kg)
Upper quarter: 0.1 oz (0.004 kg)
Heaviest: 0.2 oz (0.005 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 Teise

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

Bullhead Gudgeon Minnow Stone loach Chub Roach

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 →