Bullhead · Cottus gobio

Bullhead in the Gaddesby Brook

Largest measured bullhead: 10.6 cm

The largest bullhead measured in Environment Agency surveys of the Gaddesby Brook was 10.6 cm, recorded at Rearsby Works on 10 April 2015.

Across 51 measured bullhead, the median measured length was 5.2 cm.

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

See bullhead records across England →

Most recent observation10 April 2015Rearsby Works · 63 fish

Largest measured bullhead: 10.6 cm
Median length: 5.2 cm
Fish measured: 51
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
10.6 cm	10 Apr 2015	Rearsby Works	145144
9.9 cm	29 Mar 2011	Rearsby Works	126020
9 cm	10 Apr 2015	Rearsby Works	145144
9 cm	29 Mar 2011	Rearsby Works	126020
8.6 cm	29 Mar 2011	Rearsby Works	126020
8.1 cm	29 Mar 2011	Rearsby Works	126020
8 cm	29 Mar 2011	Rearsby Works	126020
7.8 cm	29 Mar 2011	Rearsby Works	126020
7.4 cm	29 Mar 2011	Rearsby Works	126020
7.4 cm	29 Mar 2011	Rearsby Works	126020

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
Rearsby Works	28 Jan 1993	10 Apr 2015	5
Twyford	19 Jan 1993	4 Jul 2003	4
John O'Gaunt	20 Jan 1992	4 Jul 2003	3

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

1992–2015

Survey records by year

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

192

293

094

095

396

097

098

099

000

101

002

303

004

005

006

007

008

009

010

111

012

013

014

115

Fish measured by surveyors

Measured length distribution

See how the 51 measured fish were spread across different length ranges.

Smallest: 3.5 cm
Lower quarter: 4.5 cm
Median: 5.2 cm
Upper quarter: 7.2 cm
Largest: 10.6 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Gaddesby Brook

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

Stone loach Chub Dace Minnow Roach 3-spined stickleback

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 →