RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the Main River Parrett

Largest measured brook lamprey: 21 cm

The largest brook lamprey measured in Environment Agency surveys of the Main River Parrett was 21 cm, recorded at Haselbury Mill on 10 July 2009.

Across 812 measured brook lamprey, the median measured length was 12.5 cm.

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

See brook lamprey records across England →

Most recent observation3 August 2011Haselbury Mill · 31 fish
Largest measured brook lamprey
21 cm
Median length
12.5 cm
Fish measured
812
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.

LengthSurvey dateSurvey locationSurvey ID
21 cm10 Jul 2009Haselbury Mill117982
21 cm10 Jul 2009Haselbury Mill117982
19 cm27 Jul 2011Yeo Valley Creamery127294
19 cm27 Jul 2011Yeo Valley Creamery127294
19 cm10 Jul 2009Haselbury Mill117982
19 cm10 Jul 2009Haselbury Mill117982
18.5 cm28 Jul 2009Yeo Valley Creamery118147
18.5 cm10 Jul 2009Haselbury Mill117982
18.5 cm10 Jul 2009Haselbury Mill117982
18.5 cm10 Jul 2009Haselbury Mill117982

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 surveyedFirst recordedLast recordedVisits finding brook lamprey
Haselbury Mill10 Jul 20093 Aug 20112
Bow Barn Farm30 Sept 20092 Aug 20112
Yeo Valley Creamery28 Jul 200927 Jul 20112
Downstream Lecher Water20 Jul 200920 Jul 20091

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

2009–2011

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 812 measured fish were spread across different length ranges.

Smallest
6 cm
Lower quarter
10.5 cm
Median
12.5 cm
Upper quarter
14 cm
Largest
21 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Main River Parrett

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

European eel Roach Perch Ruffe Gudgeon 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 →