Bullhead · Cottus gobio

Bullhead in the River Gunthorpe watercourse

Largest measured bullhead: 10.9 cm

The largest bullhead measured in Environment Agency surveys of the River Gunthorpe watercourse was 10.9 cm, recorded at Brinton , d/s Stody Road bridge on 7 April 2008.

Across 734 measured bullhead, the median measured length was 6.1 cm.

Surveyors recorded weights for 170 bullhead. The median was 0.1 oz (0.0036 kg) and the largest recorded weight was 0.7 oz (0.0196 kg).

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

See bullhead records across England →

Most recent observation3 March 2017Brinton , d/s Stody Road bridge · 15 fish

Largest measured bullhead: 10.9 cm
Median length: 6.1 cm
Fish measured: 734
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
10.9 cm	7 Apr 2008	Brinton , d/s Stody Road bridge	111549
10.8 cm	19 Feb 2003	Thornage Common	99885
10.7 cm	3 Mar 2017	Brinton , d/s Stody Road bridge	150311
10.4 cm	20 Feb 2003	Brinton , d/s Stody Road bridge	99886
10.2 cm	19 Feb 2003	Thornage Common	99885
10 cm	19 Feb 2003	Thornage Common	99885
10 cm	17 Feb 2003	Bulfer Grove bridge	99879
9.9 cm	13 Dec 2013	Thornage Common	140482
9.9 cm	7 Apr 2008	Gunthorpe , Valley Farm	111546
9.8 cm	7 Apr 2008	Bulfer Grove bridge	111548

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
Brinton , d/s Stody Road bridge	20 Feb 2003	3 Mar 2017	4
Bulfer Grove bridge	17 Feb 2003	4 Dec 2014	3
Gunthorpe , Valley Farm	21 Feb 2003	27 Nov 2014	3
Brinton, Old Hall	10 Jan 2014	10 Jan 2014	1
Thornage Common	19 Feb 2003	13 Dec 2013	2
North Meadow Covert	13 Dec 2013	13 Dec 2013	1
Gunthorpe , Bulfer Lane bend	18 Feb 2003	18 Feb 2003	1
Brinton , Stewpond Plantation	7 Feb 2003	7 Feb 2003	1

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

2003–2017

Survey records by year

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

603

004

005

006

007

308

009

010

111

012

213

314

015

016

117

Fish measured by surveyors

Measured length distribution

See how the 734 measured fish were spread across different length ranges.

Smallest: 2.8 cm
Lower quarter: 5.1 cm
Median: 6.1 cm
Upper quarter: 7.4 cm
Largest: 10.9 cm

0–99 mm

727

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 170 bullhead. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.0004 kg)
Lower quarter: 0.1 oz (0.0021 kg)
Median: 0.1 oz (0.0036 kg)
Upper quarter: 0.3 oz (0.0079 kg)
Heaviest: 0.7 oz (0.0196 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Gunthorpe watercourse

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

Brown / sea trout 3-spined stickleback European eel

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 →