Bullhead · Cottus gobio

Bullhead in the Bolesbridge Water

Largest measured bullhead: 8.3 cm

The largest bullhead measured in Environment Agency surveys of the Bolesbridge Water was 8.3 cm, recorded at Bolesbridge on 19 July 2010.

Across 167 measured bullhead, the median measured length was 4 cm.

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

See bullhead records across England →

Most recent observation3 August 2021Bolesbridge · 51 fish

Largest measured bullhead: 8.3 cm
Median length: 4 cm
Fish measured: 167
Survey locations: 1

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
8.3 cm	19 Jul 2010	Bolesbridge	122958
8.3 cm	19 Jul 2010	Bolesbridge	122958
8.2 cm	19 Jul 2010	Bolesbridge	122958
8 cm	3 Aug 2021	Bolesbridge	160694
7.9 cm	19 Jul 2010	Bolesbridge	122958
7.5 cm	3 Aug 2021	Bolesbridge	160694
7.2 cm	19 Jul 2010	Bolesbridge	122958
7.2 cm	19 Jul 2010	Bolesbridge	122958
7.1 cm	15 Jul 2015	Bolesbridge	145499
7.1 cm	19 Jul 2010	Bolesbridge	122958

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
Bolesbridge	3 Aug 1984	3 Aug 2021	8

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

1984–2021

Survey records by year

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

184

085

086

087

088

089

090

091

092

193

094

095

196

097

098

099

000

001

002

103

004

005

006

007

008

109

110

011

012

013

014

115

016

017

018

019

020

121

Fish measured by surveyors

Measured length distribution

See how the 167 measured fish were spread across different length ranges.

Smallest: 1.5 cm
Lower quarter: 2.6 cm
Median: 4 cm
Upper quarter: 5.9 cm
Largest: 8.3 cm

0–99 mm

167

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Bolesbridge Water

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

Minnow Stone loach Atlantic salmon 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 →