Brook lamprey · Lampetra planeri

Brook lamprey in the Batts Bridge Stream

Largest measured brook lamprey: 14 cm

The largest brook lamprey measured in Environment Agency surveys of the Batts Bridge Stream was 14 cm, recorded at Cackle Street on 1 August 2013.

Across 27 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 Batts Bridge Stream.

See brook lamprey records across England →

Most recent observation4 September 2024Cackle Street · 3 fish

Largest measured brook lamprey: 14 cm
Median length: 11.5 cm
Fish measured: 27
Survey locations: 2

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
14 cm	1 Aug 2013	Cackle Street	137922
13.5 cm	1 Aug 2013	Cackle Street	137922
13 cm	1 Aug 2013	Cackle Street	137922
13 cm	1 Aug 2013	Cackle Street	137922
13 cm	1 Aug 2013	Cackle Street	137922
12.9 cm	4 Nov 2009	Cackle Street	119948
12 cm	1 Aug 2013	Cackle Street	137922
12 cm	1 Aug 2013	Cackle Street	137922
12 cm	1 Aug 2013	Cackle Street	137922
12 cm	1 Aug 2013	Cackle Street	137922

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
Cackle Street	4 Nov 2009	4 Sept 2024	4
Batts Bridge	5 Sept 2013	5 Sept 2013	1

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

2009–2024

Survey records by year

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

109

010

011

012

213

014

015

016

117

018

019

020

021

022

023

124

Fish measured by surveyors

Measured length distribution

See how the 27 measured fish were spread across different length ranges.

Smallest: 8 cm
Lower quarter: 10 cm
Median: 11.5 cm
Upper quarter: 12 cm
Largest: 14 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Batts Bridge Stream

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

Bullhead European eel Roach Gudgeon Pike Pumpkinseed

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 →