Bullhead · Cottus gobio

Bullhead in the River Purwell

Largest measured bullhead: 11.8 cm

The largest bullhead measured in Environment Agency surveys of the River Purwell was 11.8 cm, recorded at Walsworth Common on 26 March 2014.

Across 764 measured bullhead, the median measured length was 6.2 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 Purwell.

See bullhead records across England →

Most recent observation27 April 2022Purwell Common · 26 fish

Largest measured bullhead: 11.8 cm
Median length: 6.2 cm
Fish measured: 764
Survey locations: 4

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
11.8 cm	26 Mar 2014	Walsworth Common	140546
11.3 cm	23 Oct 1998	Purwell Common	29316
10.8 cm	1 Nov 1996	Purwell Common	29308
10.8 cm	1 Nov 1996	Purwell Common	29308
10.8 cm	1 Nov 1996	Purwell Common	29308
10.8 cm	1 Nov 1996	Purwell Common	29308
10.8 cm	1 Nov 1996	Purwell Common	29308
10.8 cm	1 Nov 1996	Purwell Common	29308
10.8 cm	1 Nov 1996	Purwell Common	29308
10.8 cm	1 Nov 1996	Purwell Common	29308

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
Purwell Common	1 Nov 1996	27 Apr 2022	6
Walsworth Common	26 Mar 2014	13 Apr 2016	2
US Walsworth Common	26 Mar 2014	26 Mar 2014	1
DS Walsworth Common	26 Mar 2014	26 Mar 2014	1

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

1996–2022

Survey records by year

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

196

197

198

099

000

001

002

003

004

005

006

007

008

109

010

011

012

013

314

015

216

017

018

019

020

021

122

Fish measured by surveyors

Measured length distribution

See how the 764 measured fish were spread across different length ranges.

Smallest: 2.4 cm
Lower quarter: 5.3 cm
Median: 6.2 cm
Upper quarter: 7.8 cm
Largest: 11.8 cm

0–99 mm

719

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Purwell

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

3-spined stickleback 10-spined stickleback Perch

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 →