Brook lamprey · Lampetra planeri

Brook lamprey in the River Wallers Haven

Largest measured brook lamprey: 10.5 cm

The largest brook lamprey measured in Environment Agency surveys of the River Wallers Haven was 10.5 cm, recorded at Upstream Boreham Bridge on 21 August 2008.

This is the only individual brook lamprey length in the dataset for this river.

Surveyors recorded one individual weight: 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 Wallers Haven.

See brook lamprey records across England →

Most recent observation17 September 2018Pebsham Bridge · 11 fish

Largest measured brook lamprey: 10.5 cm
Length sample: 1 fish
Survey records: 5
Survey locations: 4

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
10.5 cm	21 Aug 2008	Upstream Boreham Bridge	114644

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
Pebsham Bridge	4 Sept 2012	17 Sept 2018	2
Downstream Tilley Bridge	9 Aug 2016	9 Aug 2016	1
Ash Bourne Stream	18 Apr 2013	18 Apr 2013	1
Upstream Boreham Bridge	21 Aug 2008	21 Aug 2008	1

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

2008–2018

Survey records by year

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

108

009

010

011

112

113

014

015

116

017

118

Fish measured by surveyors

Recorded length

One individual length was recorded for this fish and river.

Recorded length: 10.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 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 Wallers Haven

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

Perch European eel Roach Pike Common bream Gudgeon

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 →