Brook lamprey · Lampetra planeri

Brook lamprey in the River Isbourne

Largest measured brook lamprey: 19 cm

The largest brook lamprey measured in Environment Agency surveys of the River Isbourne was 19 cm, recorded at Greet on 11 August 1998.

Across 13 measured brook lamprey, the median measured length was 15.5 cm.

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

See brook lamprey records across England →

Most recent observation1 August 2012Hinton-on-the-Green

Largest measured brook lamprey: 19 cm
Median length: 15.5 cm
Fish measured: 13
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
19 cm	11 Aug 1998	Greet	52103
17 cm	11 Aug 1998	Greet	52103
16 cm	11 Aug 1998	Greet	52103
16 cm	11 Aug 1998	Greet	52103
16 cm	25 Jun 1992	Winchcombe, u/s WRW	52094
15.5 cm	11 Aug 1998	Greet	52103
15.5 cm	25 Jun 1992	Winchcombe, u/s WRW	52094
14.5 cm	22 Jul 2003	Winchcombe, u/s WRW	76489
14 cm	22 Jul 2003	Winchcombe, u/s WRW	76489
13.5 cm	14 Apr 2004	Greet	79605

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
Hinton-on-the-Green	1 Aug 2012	1 Aug 2012	1
Greet	11 Aug 1998	14 Apr 2004	2
Winchcombe, u/s WRW	25 Jun 1992	22 Jul 2003	4

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

1992–2012

Survey records by year

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

192

093

094

195

096

097

298

099

000

001

002

103

104

005

006

007

008

009

010

011

112

Fish measured by surveyors

Measured length distribution

See how the 13 measured fish were spread across different length ranges.

Smallest: 11 cm
Lower quarter: 13.5 cm
Median: 15.5 cm
Upper quarter: 16 cm
Largest: 19 cm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Isbourne

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

Brown / sea trout Bullhead Stone loach European eel Minnow Gudgeon

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 →