Brook lamprey · Lampetra planeri

Brook lamprey in the River Dane

Largest measured brook lamprey: 20 cm

The largest brook lamprey measured in Environment Agency surveys of the River Dane was 20 cm, recorded at Dada25 on 5 April 2005.

Across 72 measured brook lamprey, the median measured length was 10 cm.

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

See brook lamprey records across England →

Most recent observation4 July 2024Dada25 · 3 fish

Largest measured brook lamprey: 20 cm
Median length: 10 cm
Fish measured: 72
Survey locations: 5

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
20 cm	5 Apr 2005	Dada25	84360
18.5 cm	5 Apr 2005	Dada25	84360
18.5 cm	11 Aug 2003	Dada30	76664
17.5 cm	4 Jul 2024	Dada25	168037
17 cm	11 Aug 2003	Dada30	76664
16 cm	1 Apr 2004	Dada25	84361
16 cm	17 Jul 2003	Dada20	76392
15.6 cm	1 Apr 2004	Dada15	79957
15.5 cm	17 Jul 2003	Dada20	76392
15 cm	5 Apr 2005	Dada25	84360

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
Dada25	4 Aug 2003	4 Jul 2024	4
Dada37	3 Aug 2004	13 Jun 2006	2
Dada15	1 Apr 2004	5 Apr 2005	2
Dada30	11 Aug 2003	11 Aug 2003	1
Dada20	17 Jul 2003	17 Jul 2003	1

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

2003–2024

Survey records by year

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

303

304

205

106

007

008

009

010

011

012

013

014

015

016

017

018

019

020

021

022

023

124

Fish measured by surveyors

Measured length distribution

See how the 72 measured fish were spread across different length ranges.

Smallest: 3.5 cm
Lower quarter: 7.5 cm
Median: 10 cm
Upper quarter: 13.6 cm
Largest: 20 cm

0–99 mm

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Dane

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

Bullhead Dace Stone loach Brown / sea trout Gudgeon 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 →