Bullhead · Cottus gobio

Bullhead in the Back Stream

Largest measured bullhead: 8.3 cm

The largest bullhead measured in Environment Agency surveys of the Back Stream was 8.3 cm, recorded at Hither Mead on 25 July 1997.

Across 204 measured bullhead, the median measured length was 5.6 cm.

Surveyors recorded weights for 16 bullhead. The median was 0.1 oz (0.0035 kg) and the largest recorded weight was 0.3 oz (0.008 kg).

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

See bullhead records across England →

Most recent observation29 May 2014Fitzroy (Se-03) · 245 fish

Largest measured bullhead: 8.3 cm
Median length: 5.6 cm
Fish measured: 204
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
8.3 cm	25 Jul 1997	Hither Mead	79537
7.7 cm	29 May 2014	Fitzroy (Se-03)	140929
7.7 cm	11 Sept 1997	Lydeard Down	79534
7.6 cm	29 May 2014	Fitzroy (Se-03)	140929
7.5 cm	11 Sept 1997	Combe Florey Mill	79535
7.3 cm	29 May 2014	Fitzroy (Se-03)	140929
7.1 cm	29 May 2014	Fitzroy (Se-03)	140929
7.1 cm	29 May 2014	Fitzroy (Se-03)	140929
7.1 cm	29 May 2014	Fitzroy (Se-03)	140929
7.1 cm	29 May 2014	Fitzroy (Se-03)	140929

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
Fitzroy (Se-03)	29 Jul 1997	29 May 2014	3
Lydeard Down	11 Sept 1997	11 Sept 1997	1
Combe Florey Mill	11 Sept 1997	11 Sept 1997	1
Staplegrove Mills	4 Sept 1997	4 Sept 1997	1
The Lawns	31 Jul 1997	31 Jul 1997	1
Hither Mead	25 Jul 1997	25 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.

1997–2014

Survey records by year

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

697

098

099

000

001

002

003

004

005

006

107

008

009

010

011

012

013

114

Fish measured by surveyors

Measured length distribution

See how the 204 measured fish were spread across different length ranges.

Smallest: 2.2 cm
Lower quarter: 5.2 cm
Median: 5.6 cm
Upper quarter: 6.2 cm
Largest: 8.3 cm

0–99 mm

204

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 16 bullhead. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 0.1 oz (0.0018 kg)
Median: 0.1 oz (0.0035 kg)
Upper quarter: 0.1 oz (0.0042 kg)
Heaviest: 0.3 oz (0.008 kg)

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

More fish in this river

Explore the Back Stream

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

Brown / sea trout 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 →