RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Candover

Largest measured brook lamprey: 17.5 cm

The largest brook lamprey measured in Environment Agency surveys of the River Candover was 17.5 cm, recorded at Abbotstone on 17 August 2010.

Across 8 measured brook lamprey, the median measured length was 13.6 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 Candover.

See brook lamprey records across England →

Most recent observation18 August 2025Abbotstone · 4 fish
Largest measured brook lamprey
17.5 cm
Median length
13.6 cm
Fish measured
8
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
17.5 cm17 Aug 2010Abbotstone123812
14.5 cm17 Aug 2010Abbotstone123812
14.4 cm29 Aug 2017Duck meadow151348
14 cm1 Sept 2017Abbotstone151422
13.2 cm29 Aug 2017Duck meadow151348
12 cm29 Aug 2017Duck meadow151348
6.3 cm17 Aug 2010Abbotstone123812
5.3 cm17 Aug 2010Abbotstone123812

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
Abbotstone17 Aug 201018 Aug 20258
Granny Goss riffle8 Sept 200914 Aug 20252
Duck meadow25 Sept 201511 Aug 20253
Folly Main9 Sept 200919 Jul 20213
Upper Fobdown restoration site20 Oct 201520 Oct 20151
Lower Fobdown restoration site20 Oct 201520 Oct 20151
d/s Fobdown8 Sept 20098 Sept 20091

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

2009–2025

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 8 measured fish were spread across different length ranges.

Smallest
5.3 cm
Lower quarter
10.6 cm
Median
13.6 cm
Upper quarter
14.4 cm
Largest
17.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Candover

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

Brown / sea trout Bullhead Minnow 3-spined stickleback Atlantic salmon Stone loach

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 →