Bullhead · Cottus gobio

Bullhead in the River Dour

Largest measured bullhead: 9 cm

The largest bullhead measured in Environment Agency surveys of the River Dour was 9 cm, recorded at Pencester Gardens on 12 June 2024.

Across 347 measured bullhead, the median measured length was 5.2 cm.

Surveyors recorded weights for 3 bullhead. The median was 0.1 oz (0.004 kg) and the largest recorded weight was 0.2 oz (0.006 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 Dour.

See bullhead records across England →

Most recent observation12 June 2024Pencester Gardens · 42 fish

Largest measured bullhead: 9 cm
Median length: 5.2 cm
Fish measured: 347
Survey locations: 4

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 cm	12 Jun 2024	Pencester Gardens	165092
8 cm	11 Oct 2005	Pencester Gardens	86846
7.9 cm	12 Jun 2024	Pencester Gardens	165092
7.9 cm	20 Sept 2006	Pencester Gardens	103380
7.9 cm	11 Oct 2005	Pencester Gardens	86846
7.9 cm	12 Sept 2005	d/s Russell Gardens	86443
7.8 cm	27 Sept 2018	Pencester Gardens	153509
7.8 cm	12 Sept 2005	d/s Russell Gardens	86443
7.8 cm	12 Sept 2005	d/s Russell Gardens	86443
7.7 cm	27 Sept 2018	Pencester Gardens	153509

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
Pencester Gardens	9 Sept 2002	12 Jun 2024	7
d/s Russell Gardens	12 Sept 2005	8 May 2012	4
u/s Crabble Mill	14 Oct 2011	3 May 2012	2
d/s Pencester Foot Bridge	19 Sept 2007	19 Sept 2007	1

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

2002–2024

Survey records by year

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

102

003

004

205

206

307

008

009

010

111

312

013

014

015

016

017

118

019

020

021

022

023

124

Fish measured by surveyors

Measured length distribution

See how the 347 measured fish were spread across different length ranges.

Smallest: 2 cm
Lower quarter: 4.4 cm
Median: 5.2 cm
Upper quarter: 6.2 cm
Largest: 9 cm

0–99 mm

347

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 3 bullhead. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.004 kg)
Lower quarter: 0.1 oz (0.004 kg)
Median: 0.1 oz (0.004 kg)
Upper quarter: 0.2 oz (0.005 kg)
Heaviest: 0.2 oz (0.006 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 Dour

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

Brown / sea trout European eel 3-spined stickleback

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 →