RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Old Carr Steam

Largest measured brook lamprey: 14.6 cm

The largest brook lamprey measured in Environment Agency surveys of the River Old Carr Steam was 14.6 cm, recorded at DS Eastmoor Bridge on 20 March 2015.

Across 22 measured brook lamprey, the median measured length was 12.7 cm.

Surveyors recorded weights for 22 brook lamprey. The median was 0.1 oz (0.003 kg) and the largest recorded weight was 0.2 oz (0.005 kg).

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

See brook lamprey records across England →

Most recent observation9 May 2018Eastmoor Bridge · 1 fish
Largest measured brook lamprey
14.6 cm
Median length
12.7 cm
Fish measured
22
Survey locations
2

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
14.6 cm20 Mar 2015DS Eastmoor Bridge144465
13.6 cm30 Mar 2012Eastmoor Bridge130946
13.5 cm9 May 2018Eastmoor Bridge152518
13.2 cm20 Mar 2015DS Eastmoor Bridge144465
13.2 cm30 Mar 2012Eastmoor Bridge130946
13.2 cm30 Mar 2012Eastmoor Bridge130946
13.2 cm10 Nov 2010DS Eastmoor Bridge125006
13.1 cm20 Mar 2015DS Eastmoor Bridge144465
13.1 cm30 Mar 2012Eastmoor Bridge130946
12.8 cm20 Mar 2015DS Eastmoor Bridge144465

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
Eastmoor Bridge15 Feb 19909 May 20184
DS Eastmoor Bridge10 Nov 201020 Mar 20152

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

1990–2018

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
10.4 cm
Lower quarter
11.7 cm
Median
12.7 cm
Upper quarter
13.2 cm
Largest
14.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 22 brook lamprey. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.002 kg)
Lower quarter
0.1 oz (0.003 kg)
Median
0.1 oz (0.003 kg)
Upper quarter
0.1 oz (0.004 kg)
Heaviest
0.2 oz (0.005 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Old Carr Steam

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

Brown / sea trout Bullhead Pike Dace 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 →