Brook lamprey · Lampetra planeri

Brook lamprey in the River Main Carey

Largest measured brook lamprey: 17.7 cm

The largest brook lamprey measured in Environment Agency surveys of the River Main Carey was 17.7 cm, recorded at Towerhill Bridge on 19 June 2012.

Across 142 measured brook lamprey, the median measured length was 12.8 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 Main Carey.

See brook lamprey records across England →

Most recent observation28 July 2025Towerhill Bridge · 2 fish

Largest measured brook lamprey: 17.7 cm
Median length: 12.8 cm
Fish measured: 142
Survey locations: 6

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
17.7 cm	19 Jun 2012	Towerhill Bridge	131618
16.5 cm	21 Jul 2011	Towerhill Bridge	127094
16.3 cm	13 Jul 2010	Towerhill Bridge	122896
16 cm	22 Jul 2013	Towerhill Bridge	138042
15.9 cm	19 Jun 2012	Towerhill Bridge	131618
15.5 cm	8 Jul 2015	Towerhill Bridge	145372
15.5 cm	19 Jun 2012	Towerhill Bridge	131618
15.4 cm	22 Jul 2013	Towerhill Bridge	138042
15.4 cm	19 Jun 2012	Towerhill Bridge	131618
15.2 cm	13 Jul 2010	Towerhill Bridge	122896

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
Towerhill Bridge	13 Jul 2010	28 Jul 2025	10
Halwill Bridge	1 Sept 2008	1 Aug 2022	3
Dury Ford	9 Jul 2010	11 Jul 2022	3
Heale Bridge	7 Jul 2010	17 Jun 2022	3
Upstream Middle Bridge	12 Jul 2016	12 Jul 2016	1
Middle Bridge	25 Jul 1995	24 Jul 2009	2

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

1995–2025

Survey records by year

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

195

096

097

098

099

000

001

002

003

004

005

006

007

108

109

310

111

112

113

014

115

516

117

018

119

020

021

322

123

024

125

Fish measured by surveyors

Measured length distribution

See how the 142 measured fish were spread across different length ranges.

Smallest: 2.4 cm
Lower quarter: 11.5 cm
Median: 12.8 cm
Upper quarter: 13.8 cm
Largest: 17.7 cm

0–99 mm

100–199 mm

127

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Carey

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

Bullhead Brown / sea trout Minnow Atlantic salmon Stone loach 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 →