RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Rib

Largest measured brook lamprey: 18.5 cm

The largest brook lamprey measured in Environment Agency surveys of the River Rib was 18.5 cm, recorded at Barwick Ford on 16 September 2014.

Across 22 measured brook lamprey, the median measured length was 17.1 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 Rib.

See brook lamprey records across England →

Most recent observation28 August 2025Bengeo Hall
Largest measured brook lamprey
18.5 cm
Median length
17.1 cm
Fish measured
22
Survey locations
3

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
18.5 cm16 Sept 2014Barwick Ford142813
18.4 cm16 Sept 2014Barwick Ford142813
18.4 cm16 Sept 2014Barwick Ford142813
18.3 cm16 Sept 2014Barwick Ford142813
18.2 cm16 Sept 2014Barwick Ford142813
18 cm16 Sept 2014Barwick Ford142813
17.4 cm16 Sept 2014Barwick Ford142813
17.3 cm16 Sept 2014Barwick Ford142813
17.2 cm16 Sept 2014Barwick Ford142813
17.2 cm16 Sept 2014Barwick Ford142813

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
Bengeo Hall12 Sept 202328 Aug 20252
Barwick Ford23 Oct 20035 Sept 20243
Ford Bridge Braughing12 Sept 20143 Oct 20194

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

2003–2025

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 22 measured fish were spread across different length ranges.

Smallest
12 cm
Lower quarter
15.4 cm
Median
17.1 cm
Upper quarter
17.9 cm
Largest
18.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Rib

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

Brown / sea trout Bullhead Roach Chub Dace Pike

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 →