RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Hamble

Largest measured brook lamprey: 16.5 cm

The largest brook lamprey measured in Environment Agency surveys of the River Hamble was 16.5 cm, recorded at Brooklands Farm on 21 July 2008.

Across 10 measured brook lamprey, the median measured length was 11.8 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 Hamble.

See brook lamprey records across England →

Most recent observation9 July 2024Lower Wangfield Farm Meadow · 1 fish
Largest measured brook lamprey
16.5 cm
Median length
11.8 cm
Fish measured
10
Survey locations
7

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
16.5 cm21 Jul 2008Brooklands Farm113128
15.2 cm21 Jul 2008Brooklands Farm113128
14 cm21 Jul 2008Brooklands Farm113128
12.5 cm21 Jul 2008Brooklands Farm113128
12.5 cm21 Jul 2008Brooklands Farm113128
11 cm21 Jul 2008Brooklands Farm113128
10.5 cm21 Jul 2008Brooklands Farm113128
10.1 cm21 Jul 2008Brooklands Farm113128
9 cm21 Jul 2008Brooklands Farm113128
8.4 cm21 Jul 2008Brooklands Farm113128

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
Lower Wangfield Farm Meadow13 Sept 20129 Jul 20242
Tangier Farm2 Aug 20212 Aug 20211
Upstream of railway viaduct22 Aug 201822 Aug 20181
Treefield14 Jul 201614 Jul 20161
Durley Mill16 May 201316 May 20131
Brooklands Farm21 Jul 200821 Jul 20081
Frog Mill27 Aug 200227 Aug 20021

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

2002–2024

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 10 measured fish were spread across different length ranges.

Smallest
8.4 cm
Lower quarter
10.2 cm
Median
11.8 cm
Upper quarter
13.6 cm
Largest
16.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Hamble

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

Brown / sea trout European eel Bullhead Grayling Roach Dace

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 →