Bullhead · Cottus gobio

Bullhead in the River Cockhaise

Largest measured bullhead: 9.3 cm

The largest bullhead measured in Environment Agency surveys of the River Cockhaise was 9.3 cm, recorded at Wildboar Bridge on 20 September 2023.

Across 226 measured bullhead, the median measured length was 5.8 cm.

Surveyors recorded weights for 82 bullhead. The median was 0.1 oz (0.003 kg) and the largest recorded weight was 0.4 oz (0.012 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 Cockhaise.

See bullhead records across England →

Most recent observation31 July 2024Wildboar Bridge · 19 fish

Largest measured bullhead: 9.3 cm
Median length: 5.8 cm
Fish measured: 226
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
9.3 cm	20 Sept 2023	Wildboar Bridge	163716
9 cm	26 Aug 2003	Wildboar Bridge	76916
8.9 cm	26 Jun 2001	Wildboar Bridge	51877
8.6 cm	31 Jul 2024	Wildboar Bridge	166432
8.6 cm	26 Jun 2001	Wildboar Bridge	51877
8.5 cm	20 Sept 2023	Wildboar Bridge	163716
8.5 cm	20 Sept 2023	Wildboar Bridge	163716
8.5 cm	26 Jun 2001	Wildboar Bridge	51877
8.4 cm	20 Sept 2023	Wildboar Bridge	163716
8.4 cm	11 Aug 2011	Wildboar Bridge	127362

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
Wildboar Bridge	26 Jun 2001	31 Jul 2024	9
Upstream Cinder Hill Trout Fishery	13 May 2014	13 May 2014	1
Holywell Pumping Station	2 May 2013	2 May 2013	1

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

2001–2024

Survey records by year

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

101

002

103

004

005

006

007

008

109

010

111

012

213

114

115

016

117

018

019

020

021

022

123

124

Fish measured by surveyors

Measured length distribution

See how the 226 measured fish were spread across different length ranges.

Smallest: 2.5 cm
Lower quarter: 4 cm
Median: 5.8 cm
Upper quarter: 7.1 cm
Largest: 9.3 cm

0–99 mm

226

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 82 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 (0.003 kg)
Upper quarter: 0.2 oz (0.005 kg)
Heaviest: 0.4 oz (0.012 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 Cockhaise

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

Brown / sea trout Perch European eel Minnow Gudgeon Chub

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 →