Brook lamprey · Lampetra planeri

Brook lamprey in the The Goit

Largest measured brook lamprey: 17 cm

The largest brook lamprey measured in Environment Agency surveys of the The Goit was 17 cm, recorded at Site 2 d/s Brinscall (Moor Road) on 25 June 2008.

Across 58 measured brook lamprey, the median measured length was 9 cm.

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

See brook lamprey records across England →

Most recent observation18 July 2023Downstream Croft

Largest measured brook lamprey: 17 cm
Median length: 9 cm
Fish measured: 58
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.

Length	Survey date	Survey location	Survey ID
17 cm	25 Jun 2008	Site 2 d/s Brinscall (Moor Road)	112197
12 cm	19 Jul 2006	Site 2 d/s Brinscall (Moor Road)	102510
11.5 cm	6 Sept 2010	Downstream Croft	123703
11 cm	6 Sept 2010	Downstream Croft	123703
11 cm	16 Jun 2009	Site 2 d/s Brinscall (Moor Road)	117386
10.8 cm	26 Sept 2006	Downstream Croft	102503
10.5 cm	30 Jun 2010	Site 2 d/s Brinscall (Moor Road)	122570
10.5 cm	11 Jul 2006	Downstream Croft	102514
10.4 cm	16 Jun 2009	Site 2 d/s Brinscall (Moor Road)	117386
10 cm	6 Sept 2010	Downstream Croft	123703

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
Site 2 d/s Brinscall (Moor Road)	19 Jul 2006	18 Jul 2023	6
Downstream Croft	8 Aug 2000	18 Jul 2023	7

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

2000–2023

Survey records by year

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

100

001

002

003

004

005

306

007

108

209

310

011

012

113

014

015

016

017

018

019

020

021

022

223

Fish measured by surveyors

Measured length distribution

See how the 58 measured fish were spread across different length ranges.

Smallest: 3.3 cm
Lower quarter: 7 cm
Median: 9 cm
Upper quarter: 9.9 cm
Largest: 17 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the The Goit

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

Brown / sea trout

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 →