Brook lamprey · Lampetra planeri

Brook lamprey in the Cant Beck

Largest measured brook lamprey: 15 cm

The largest brook lamprey measured in Environment Agency surveys of the Cant Beck was 15 cm, recorded at Tunstall on 25 July 2025.

Across 36 measured brook lamprey, the median measured length was 11.5 cm.

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

See brook lamprey records across England →

Most recent observation25 July 2025Tunstall · 12 fish

Largest measured brook lamprey: 15 cm
Median length: 11.5 cm
Fish measured: 36
Survey locations: 3

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 cm	25 Jul 2025	Tunstall	179971
14.5 cm	25 Jul 2025	Tunstall	179971
14 cm	25 Jul 2025	Tunstall	179971
14 cm	30 Jul 2013	Tunstall	137640
13 cm	25 Aug 2016	Tunstall	149064
13 cm	30 Jul 2013	Tunstall	137640
13 cm	30 Jul 2013	Tunstall	137640
12.6 cm	30 Jul 2013	Tunstall	137640
12.5 cm	30 Jul 2013	Tunstall	137640
12.5 cm	30 Jul 2013	Tunstall	137640

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
Tunstall	16 Jul 2007	25 Jul 2025	4
Churchfield Farm	17 Oct 2010	17 Oct 2010	1
150yds Upstream Cant Bridge	17 Oct 2010	17 Oct 2010	1

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

2007–2025

Survey records by year

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

107

008

009

210

011

012

113

014

015

116

017

018

019

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 36 measured fish were spread across different length ranges.

Smallest: 10 cm
Lower quarter: 10.5 cm
Median: 11.5 cm
Upper quarter: 12.5 cm
Largest: 15 cm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Cant Beck

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

Brown / sea trout Atlantic salmon 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 →