RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Main Cardinham

Largest measured brook lamprey: 14.8 cm

The largest brook lamprey measured in Environment Agency surveys of the River Main Cardinham was 14.8 cm, recorded at Margate Ford on 10 July 2012.

Across 98 measured brook lamprey, the median measured length was 11.1 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 Main Cardinham.

See brook lamprey records across England →

Most recent observation21 August 2024Woodford · 2 fish
Largest measured brook lamprey
14.8 cm
Median length
11.1 cm
Fish measured
98
Survey locations
5

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
14.8 cm10 Jul 2012Margate Ford132300
14.5 cm16 Sept 2021Woodford160518
14.4 cm9 Sept 2011Woodford127866
14.2 cm9 Sept 2011Woodford127866
14.2 cm9 Sept 2011Woodford127866
13.5 cm16 Sept 2021Woodford160518
13.5 cm18 Sept 2018Woodford153949
13.5 cm18 Sept 2018Woodford153949
13.5 cm9 Sept 2011Woodford127866
13.4 cm12 Aug 1977Margate Ford118777

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
Woodford18 Jul 199421 Aug 20249
Margate Ford12 Aug 197711 Sept 201913
Fletchers Bridge17 Sept 200217 Sept 20021
Peach Bridge18 Jul 199416 Sept 20022
Cardinham28 Jul 199428 Jul 19941

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

1977–2024

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 98 measured fish were spread across different length ranges.

Smallest
3.7 cm
Lower quarter
9.2 cm
Median
11.1 cm
Upper quarter
12.3 cm
Largest
14.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Cardinham

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

Brown / sea trout Bullhead Atlantic salmon European eel

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 →