Bullhead · Cottus gobio

Bullhead in the Leighton/Pott Beck

Largest measured bullhead: 8.8 cm

The largest bullhead measured in Environment Agency surveys of the Leighton/Pott Beck was 8.8 cm, recorded at Wr Pb5 on 8 October 2018.

Across 112 measured bullhead, the median measured length was 6.6 cm.

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

See bullhead records across England →

Most recent observation8 September 2025Leighton Beck / Pott Beck, Leighton

Largest measured bullhead: 8.8 cm
Median length: 6.6 cm
Fish measured: 112
Survey locations: 3

Individual EA measurements

Largest measured bullhead

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
8.8 cm	8 Oct 2018	Wr Pb5	154379
8.8 cm	8 Oct 2018	Wr Pb5	154379
8.8 cm	16 Sept 2013	Leighton Beck / Pott Beck, Leighton	138921
8.5 cm	8 Oct 2018	Wr Pb5	154379
8.5 cm	8 Oct 2018	Wr Pb4	154378
8.4 cm	8 Oct 2018	Wr Pb4	154378
8.2 cm	8 Oct 2018	Wr Pb4	154378
8.2 cm	16 Sept 2013	Leighton Beck / Pott Beck, Leighton	138921
8.1 cm	8 Oct 2018	Wr Pb4	154378
8 cm	8 Oct 2018	Wr Pb5	154379

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where bullhead were found

Each point marks a survey location with at least one bullhead 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 bullhead
Leighton Beck / Pott Beck, Leighton	16 Sept 2013	8 Sept 2025	2
Wr Pb5	8 Oct 2018	8 Oct 2018	1
Wr Pb4	8 Oct 2018	8 Oct 2018	1

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

2013–2025

Survey records by year

Each bar shows how many survey visits recorded bullhead that year.

113

014

015

016

017

218

019

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 112 measured fish were spread across different length ranges.

Smallest: 1.9 cm
Lower quarter: 5.6 cm
Median: 6.6 cm
Upper quarter: 7.5 cm
Largest: 8.8 cm

0–99 mm

112

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Leighton/Pott Beck

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 →