RiverFish

Brook lamprey · Lampetra planeri

Brook lamprey in the River Lymington

Largest measured brook lamprey: 13.5 cm

The largest brook lamprey measured in Environment Agency surveys of the River Lymington was 13.5 cm, recorded at Puttle's Bridge on 12 May 2011.

Across 19 measured brook lamprey, the median measured length was 11 cm.

Surveyors recorded weights for 2 brook lamprey. The median was 0.1 oz (0.0025 kg) and the largest recorded weight was 0.1 oz (0.003 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 Lymington.

See brook lamprey records across England →

Most recent observation17 September 2025u/s Blackensford / Bratley confluence · 3 fish
Largest measured brook lamprey
13.5 cm
Median length
11 cm
Fish measured
19
Survey locations
24

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
13.5 cm12 May 2011Puttle's Bridge126210
13.2 cm5 Aug 2010u/s Blackensford / Bratley confluence123884
13 cm17 May 2006Woolsfield Hill100023
12.5 cm12 May 2011Puttle's Bridge126210
11.7 cm17 May 2006Hart Hill100639
11.5 cm5 Aug 2010u/s Blackensford / Bratley confluence123884
11.1 cm13 Aug 2007Puttle's Bridge108127
11 cm5 Aug 2010u/s Blackensford / Bratley confluence123884
11 cm5 May 2006Poundhill Heath99748
11 cm5 May 2006Highland water reptillary99735

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
u/s Blackensford / Bratley confluence24 Aug 200717 Sept 202511
Turfcroft Farm31 Jul 20138 Aug 20253
Fletchers Water11 Jul 201928 Jul 20252
Bratley Wood31 Oct 200728 Jul 20253
Upstream of Puttle's Bridge6 Aug 201318 Jul 20253
Bolderford Bridge6 Aug 201318 Jul 20253
Withybed Bottom25 Aug 201117 Jul 20257
Lucas Castle26 Jul 201317 Jul 20253
Blackensford Lawn17 Jul 202517 Jul 20251
Slufter's Inclosure7 Jul 20257 Jul 20251
Ocknell Inclosure26 Jul 20137 Jul 20252
Bratley Arch10 Sept 200712 Jul 20193
Forest Gate1 Aug 201311 Jul 20192
Upstream of Turfcroft Farm9 Jul 20199 Jul 20191
Long Brook4 Jul 20194 Jul 20191
Blackensford Bottom tributary2 Sept 20132 Sept 20131
Ivywood6 Aug 20136 Aug 20131
Red Rise23 Aug 200712 May 20112
Puttle's Bridge13 Aug 200712 May 20112
d/s Blackensford / Bratley confluence26 Aug 200926 Aug 20091
Woolsfield Hill17 May 200617 May 20061
Hart Hill17 May 200617 May 20061
Poundhill Heath5 May 20065 May 20061
Highland water reptillary5 May 20065 May 20061

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

2006–2025

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 19 measured fish were spread across different length ranges.

Smallest
5.5 cm
Lower quarter
9.9 cm
Median
11 cm
Upper quarter
11.6 cm
Largest
13.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 2 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 (0.0022 kg)
Median
0.1 oz (0.0025 kg)
Upper quarter
0.1 oz (0.0028 kg)
Heaviest
0.1 oz (0.003 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 Lymington

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

Brown / sea trout Bullhead Minnow Stone loach European eel Chub

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 →