Brook lamprey · Lampetra planeri

Brook lamprey in the River Hamps

Largest measured brook lamprey: 19.5 cm

The largest brook lamprey measured in Environment Agency surveys of the River Hamps was 19.5 cm, recorded at Ford on 3 September 2013.

Across 18 measured brook lamprey, the median measured length was 15.8 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 Hamps.

See brook lamprey records across England →

Most recent observation3 September 2013Ford · 4 fish

Largest measured brook lamprey: 19.5 cm
Median length: 15.8 cm
Fish measured: 18
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
19.5 cm	3 Sept 2013	Ford	139230
18.5 cm	3 Sept 2013	Ford	139230
17.5 cm	3 Sept 2013	Onecote Grange	139203
17.5 cm	8 Apr 2010	Onecote Grange	121626
17.3 cm	3 Sept 2013	Onecote Grange	139203
16.8 cm	8 Apr 2010	Ford	121628
16.5 cm	3 Sept 2013	Ford	139230
16.5 cm	8 Apr 2010	Onecote Grange	121626
16.5 cm	8 Apr 2010	Onecote Grange	121626
15 cm	8 Apr 2010	Onecote Grange	121626

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
Onecote Grange	30 Mar 1994	3 Sept 2013	4
Ford	2 Sept 1997	3 Sept 2013	3
Waterhouses	15 Oct 2003	15 Oct 2003	1
Stonyslack Farm	17 Apr 2003	17 Apr 2003	1

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

1994–2013

Survey records by year

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

194

095

096

197

098

099

000

001

002

303

004

005

006

007

008

009

210

011

012

213

Fish measured by surveyors

Measured length distribution

See how the 18 measured fish were spread across different length ranges.

Smallest: 7.5 cm
Lower quarter: 14.5 cm
Median: 15.8 cm
Upper quarter: 17.2 cm
Largest: 19.5 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Hamps

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

Brown / sea trout Bullhead Stone loach Minnow Grayling

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 →