Bullhead · Cottus gobio

Bullhead in the Ozelworth Brook

Largest measured bullhead: 10.3 cm

The largest bullhead measured in Environment Agency surveys of the Ozelworth Brook was 10.3 cm, recorded at Gastons Brook on 8 August 1994.

Across 210 measured bullhead, the median measured length was 6.3 cm.

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

See bullhead records across England →

Most recent observation4 August 2010Hopyard Farm · 126 fish

Largest measured bullhead: 10.3 cm
Median length: 6.3 cm
Fish measured: 210
Survey locations: 8

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
10.3 cm	8 Aug 1994	Gastons Brook	68542
10.2 cm	16 Mar 2000	Gastons Brook	68581
10.1 cm	3 Jul 1991	Lower Barns Farm	66600
10 cm	16 Mar 2000	Downstream sewage works	68640
10 cm	16 Mar 2000	Downstream sewage works	68640
10 cm	8 Aug 1994	Gastons Brook	68542
10 cm	8 Aug 1994	Lower Barns Farm	66562
9.9 cm	3 Jul 1991	Hill Mill	66480
9.8 cm	8 Aug 1994	Lower Barns Farm	66562
9.5 cm	16 Mar 2000	Hill Mill	68661

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
Park Farm	4 Aug 2010	4 Aug 2010	1
Hopyard Farm	4 Aug 2010	4 Aug 2010	1
Hill Mill	3 Jul 1991	18 Aug 2004	4
Gastons Brook	8 Aug 1994	18 Aug 2004	3
U/s of sewage works	16 Mar 2000	16 Mar 2000	1
Downstream sewage works	16 Mar 2000	16 Mar 2000	1
Lower Barns Farm	3 Jul 1991	23 Aug 1999	3
Kilcott Cottage, Kilcott Stream	2 Jul 1991	8 Aug 1994	2

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

1991–2010

Survey records by year

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

391

092

093

494

095

096

097

098

199

400

001

002

003

204

005

006

007

008

009

210

Fish measured by surveyors

Measured length distribution

See how the 210 measured fish were spread across different length ranges.

Smallest: 2 cm
Lower quarter: 5.4 cm
Median: 6.3 cm
Upper quarter: 7.4 cm
Largest: 10.3 cm

0–99 mm

203

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Ozelworth Brook

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

Brown / sea trout European eel 3-spined stickleback Rainbow 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 →