Brook lamprey · Lampetra planeri

Brook lamprey in the Slad Brook

Largest measured brook lamprey: 15.4 cm

The largest brook lamprey measured in Environment Agency surveys of the Slad Brook was 15.4 cm, recorded at Steanbridge Mill on 13 May 2010.

Across 39 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 Slad Brook.

See brook lamprey records across England →

Most recent observation25 August 2011Steanbridge Mill · 31 fish

Largest measured brook lamprey: 15.4 cm
Median length: 12.8 cm
Fish measured: 39
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
15.4 cm	13 May 2010	Steanbridge Mill	121523
15.1 cm	25 Aug 2011	Steanbridge Mill	129207
15.1 cm	25 Aug 2011	Steanbridge Mill	129207
15 cm	25 Aug 2011	Steanbridge Mill	129207
14.7 cm	25 Aug 2011	Steanbridge Mill	129207
14.5 cm	25 Aug 2011	Steanbridge Mill	129207
14.5 cm	25 Aug 2011	Steanbridge Mill	129207
14.3 cm	25 Aug 2011	Steanbridge Mill	129207
14.2 cm	25 Aug 2011	Steanbridge Mill	129207
14.1 cm	25 Aug 2011	Steanbridge Mill	129207

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
Steanbridge Mill	16 Mar 1992	25 Aug 2011	5
New Mills Trading Estate	12 May 2010	12 May 2010	1

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

1992–2011

Survey records by year

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

192

093

094

095

096

197

098

099

000

001

002

003

004

105

006

007

008

009

210

111

Fish measured by surveyors

Measured length distribution

See how the 39 measured fish were spread across different length ranges.

Smallest: 8.3 cm
Lower quarter: 11.5 cm
Median: 12.8 cm
Upper quarter: 14.1 cm
Largest: 15.4 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Slad Brook

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

Brown / sea trout Bullhead 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 →