Brook lamprey · Lampetra planeri

Brook lamprey in the Washford River

Largest measured brook lamprey: 17 cm

The largest brook lamprey measured in Environment Agency surveys of the Washford River was 17 cm, recorded at Kentsford Farm on 20 May 2009.

Across 69 measured brook lamprey, the median measured length was 14 cm.

Surveyors recorded weights for 34 brook lamprey. The median was 0.1 oz (0.003 kg) and the largest recorded weight was 0.5 oz (0.015 kg).

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

See brook lamprey records across England →

Most recent observation26 May 2011Luxborough · 4 fish

Largest measured brook lamprey: 17 cm
Median length: 14 cm
Fish measured: 69
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
17 cm	20 May 2009	Kentsford Farm	117260
17 cm	20 May 2009	Kentsford Farm	117260
16.6 cm	21 Aug 2001	Kentsford Farm	72577
16.5 cm	3 Jun 2009	Wansborough Paper Mill	117302
16.5 cm	3 Jun 2009	Wansborough Paper Mill	117302
16.5 cm	21 Aug 2001	Kentsford Farm	72577
16 cm	6 Apr 2006	Kentsford Farm	90796
16 cm	6 Apr 2006	Kentsford Farm	90796
16 cm	21 Aug 2001	Kentsford Farm	72577
15.8 cm	20 May 2009	Kentsford Farm	117260

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
Luxborough	26 Mar 2004	26 May 2011	2
Wansborough Paper Mill	3 Jun 2009	3 Jun 2009	1
Kentsford Farm	21 Aug 2001	20 May 2009	5
Watchet, Werren Close	9 Oct 2001	15 May 2008	2

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

2001–2011

Survey records by year

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

201

002

003

104

005

106

107

208

209

010

111

Fish measured by surveyors

Measured length distribution

See how the 69 measured fish were spread across different length ranges.

Smallest: 6.5 cm
Lower quarter: 12 cm
Median: 14 cm
Upper quarter: 15 cm
Largest: 17 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 34 brook lamprey. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 0.1 oz (0.002 kg)
Median: 0.1 oz (0.003 kg)
Upper quarter: 0.2 oz (0.005 kg)
Heaviest: 0.5 oz (0.015 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Washford River

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

Brown / sea trout Bullhead European eel Rainbow trout Minnow 3-spined stickleback

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 →