Bullhead · Cottus gobio

Bullhead in the River Wheelock

Largest measured bullhead: 12.9 cm

The largest bullhead measured in Environment Agency surveys of the River Wheelock was 12.9 cm, recorded at Dawh06 on 11 June 2004.

Across 109 measured bullhead, the median measured length was 8.2 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 Wheelock.

See bullhead records across England →

Most recent observation20 August 2024Dawh06

Largest measured bullhead: 12.9 cm
Median length: 8.2 cm
Fish measured: 109
Survey locations: 6

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
12.9 cm	11 Jun 2004	Dawh06	80178
11.9 cm	4 Jun 2003	Dawh06	76059
11.4 cm	14 Jun 2004	Dawh25	80206
11.4 cm	4 Jun 2003	Dawh06	76059
11.1 cm	4 Jun 2003	Dawh06	76059
10.9 cm	11 Jun 2004	Dawh06	80178
10.9 cm	4 Jun 2003	Dawh06	76059
10.9 cm	4 Jun 2003	Dawh06	76059
10.7 cm	4 Jun 2003	Dawh06	76059
10.6 cm	11 Jun 2004	Dawh06	80178

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
Dawh06	29 Aug 2002	20 Aug 2024	7
Dawh10	23 Jul 2001	23 May 2014	4
Dawh20	15 Jun 2004	9 Mar 2011	3
Dawh15	5 Jul 2006	5 Jul 2006	1
Dawh25	10 Jul 2001	28 Jun 2006	7
Wh02	21 Jul 1997	21 Jul 1997	1

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

1997–2024

Survey records by year

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

197

098

099

000

201

202

203

304

505

406

007

008

009

010

211

012

013

114

015

016

017

018

019

020

021

022

023

124

Fish measured by surveyors

Measured length distribution

See how the 109 measured fish were spread across different length ranges.

Smallest: 2.4 cm
Lower quarter: 7.1 cm
Median: 8.2 cm
Upper quarter: 9.5 cm
Largest: 12.9 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Wheelock

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

Gudgeon Roach 3-spined stickleback Chub European eel 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 →