Bullhead · Cottus gobio

Bullhead in the Bull River

Largest measured bullhead: 8.2 cm

The largest bullhead measured in Environment Agency surveys of the Bull River was 8.2 cm, recorded at Hamly Bridge on 6 September 2004.

Across 91 measured bullhead, the median measured length was 5.5 cm.

Surveyors recorded weights for 91 bullhead. The median was 0.1 oz (0.002 kg) and the largest recorded weight was 0.3 oz (0.009 kg).

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

See bullhead records across England →

Most recent observation25 April 2013Hamly Bridge · 39 fish

Largest measured bullhead: 8.2 cm
Median length: 5.5 cm
Fish measured: 91
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
8.2 cm	6 Sept 2004	Hamly Bridge	82161
7.7 cm	6 Sept 2004	Hamly Bridge	82161
7.6 cm	6 Sept 2004	Hamly Bridge	82161
7.5 cm	6 Sept 2004	Hamly Bridge	82161
7.1 cm	1 Sept 2004	Lea Bridge	81828
7 cm	1 Sept 2004	Lea Bridge	81828
7 cm	19 Oct 1999	Lea Bridge	52107
6.9 cm	6 Sept 2004	Hamly Bridge	82161
6.9 cm	1 Sept 2004	Lea Bridge	81828
6.7 cm	6 Sept 2004	Hamly Bridge	82161

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
Lea Bridge	19 Oct 1999	25 Apr 2013	3
Hamly Bridge	8 Oct 1999	25 Apr 2013	3
Helingly	21 Jul 2000	21 Jul 2000	1

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

1999–2013

Survey records by year

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

299

100

001

002

003

204

005

006

007

008

009

010

011

012

213

Fish measured by surveyors

Measured length distribution

See how the 91 measured fish were spread across different length ranges.

Smallest: 2 cm
Lower quarter: 4 cm
Median: 5.5 cm
Upper quarter: 6.3 cm
Largest: 8.2 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 91 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 oz (0.001 kg)
Median: 0.1 oz (0.002 kg)
Upper quarter: 0.1 oz (0.003 kg)
Heaviest: 0.3 oz (0.009 kg)

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

More fish in this river

Explore the Bull River

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

Brown / sea trout Minnow Chub European eel Stone loach

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 →