Brook lamprey · Lampetra planeri

Brook lamprey in the Stebbing Brook

Largest measured brook lamprey: 15.9 cm

The largest brook lamprey measured in Environment Agency surveys of the Stebbing Brook was 15.9 cm, recorded at Felsted STW on 29 March 2012.

Across 24 measured brook lamprey, the median measured length was 13.3 cm.

Surveyors recorded weights for 21 brook lamprey. The median was 0.1 oz (0.0038 kg) and the largest recorded weight was 0.3 oz (0.0071 kg).

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

See brook lamprey records across England →

Most recent observation29 March 2012Felsted STW · 21 fish

Largest measured brook lamprey: 15.9 cm
Median length: 13.3 cm
Fish measured: 24
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.

Length	Survey date	Survey location	Survey ID
15.9 cm	29 Mar 2012	Felsted STW	131132
15.8 cm	29 Mar 2012	Felsted STW	131132
15.5 cm	2 Feb 2005	Felsted STW	84206
15.1 cm	29 Mar 2012	Felsted STW	131132
14.9 cm	29 Mar 2012	Felsted STW	131132
14.8 cm	29 Mar 2012	Felsted STW	131132
14.8 cm	29 Mar 2012	Felsted STW	131132
14.7 cm	29 Mar 2012	Felsted STW	131132
14.4 cm	29 Mar 2012	Felsted STW	131132
14.4 cm	29 Mar 2012	Felsted STW	131132

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 surveyed	First recorded	Last recorded	Visits finding brook lamprey
Felsted STW	10 Feb 1998	29 Mar 2012	3
Stebbing Village	11 Feb 1998	11 Feb 1998	1
Lashley Hall	11 Feb 1998	11 Feb 1998	1

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

1998–2012

Survey records by year

Each bar shows how many survey visits recorded brook lamprey that year.

398

099

000

001

002

003

004

105

006

007

008

009

010

011

112

Fish measured by surveyors

Measured length distribution

See how the 24 measured fish were spread across different length ranges.

Smallest: 11.2 cm
Lower quarter: 12.7 cm
Median: 13.4 cm
Upper quarter: 14.8 cm
Largest: 15.9 cm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 21 brook lamprey. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.0018 kg)
Lower quarter: 0.1 oz (0.0035 kg)
Median: 0.1 oz (0.0038 kg)
Upper quarter: 0.2 oz (0.0054 kg)
Heaviest: 0.3 oz (0.0071 kg)

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

More fish in this river

Explore the Stebbing Brook

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

3-spined stickleback Bullhead Stone loach Brown / sea trout Minnow

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 →