RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the Comebow Stream

Largest measured brook lamprey: 13.8 cm

The largest brook lamprey measured in Environment Agency surveys of the Comebow Stream was 13.8 cm, recorded at Comebow on 19 August 2021.

Across 48 measured brook lamprey, the median measured length was 11.2 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Comebow Stream.

See brook lamprey records across England →

Most recent observation5 August 2025Comebow · 10 fish
Largest measured brook lamprey
13.8 cm
Median length
11.2 cm
Fish measured
48
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
13.8 cm19 Aug 2021Comebow160579
13.5 cm29 Jul 2022Comebow161666
13.4 cm29 Jul 2022Comebow161666
13.4 cm19 Aug 2021Comebow160579
13 cm5 Aug 2025Comebow178754
12.8 cm19 Aug 2021Comebow160579
12.7 cm19 Aug 2021Comebow160579
12.6 cm29 Jul 2022Comebow161666
12.6 cm19 Aug 2021Comebow160579
12.5 cm29 Jul 2022Comebow161666

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
Comebow4 Aug 20155 Aug 20259

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

2015–2025

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 48 measured fish were spread across different length ranges.

Smallest
4.9 cm
Lower quarter
10 cm
Median
11.2 cm
Upper quarter
12 cm
Largest
13.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Comebow Stream

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

Brown / sea trout Bullhead Atlantic salmon

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 →