RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Main De Lank

Largest measured brook lamprey: 13.2 cm

The largest brook lamprey measured in Environment Agency surveys of the River Main De Lank was 13.2 cm, recorded at Keybridge on 27 July 2016.

Across 31 measured brook lamprey, the median measured length was 10.2 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 De Lank.

See brook lamprey records across England →

Most recent observation9 July 2026Keybridge · 1 fish
Largest measured brook lamprey
13.2 cm
Median length
10.2 cm
Fish measured
31
Survey locations
1

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
13.2 cm27 Jul 2016Keybridge148707
13 cm9 Jul 2026Keybridge182139
12.3 cm29 Jul 2013Keybridge138013
12.3 cm18 Aug 2009Keybridge118809
12.2 cm12 Jul 2022Keybridge161637
12.2 cm29 Jul 2013Keybridge138013
11.8 cm24 Jul 2018Keybridge152981
11.5 cm18 Aug 2009Keybridge118809
11.1 cm18 Aug 2009Keybridge118809
11 cm5 Jul 2010Keybridge122861

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
Keybridge13 Jul 20069 Jul 202611

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

2006–2026

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 31 measured fish were spread across different length ranges.

Smallest
5 cm
Lower quarter
8.7 cm
Median
10.2 cm
Upper quarter
11.3 cm
Largest
13.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main De Lank

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

Brown / sea trout European eel Atlantic salmon Bullhead

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 →