Bullhead · Cottus gobio

Bullhead in the Bentley Brook

Largest measured bullhead: 9.6 cm

The largest bullhead measured in Environment Agency surveys of the Bentley Brook was 9.6 cm, recorded at Woodside on 25 August 2015.

Across 63 measured bullhead, the median measured length was 7 cm.

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

See bullhead records across England →

Most recent observation25 August 2015Woodside · 20 fish

Largest measured bullhead: 9.6 cm
Median length: 7 cm
Fish measured: 63
Survey locations: 5

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
9.6 cm	25 Aug 2015	Woodside	146979
9.3 cm	25 Aug 2015	Woodside	146979
9 cm	22 Aug 2013	Mapleton Bridge	139418
8.9 cm	25 Aug 2015	Woodside	146979
8.9 cm	25 Aug 2015	Woodside	146979
8.6 cm	22 Aug 2013	Mapleton Bridge	139418
8.5 cm	25 Aug 2015	Woodside	146979
8.5 cm	22 Aug 2013	Mapleton Bridge	139418
8.3 cm	22 Aug 2013	Mapleton Bridge	139418
8.2 cm	25 Aug 2015	Woodside	146979

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
Woodside	25 Aug 2015	25 Aug 2015	1
Downstream Horsley Farm	25 Aug 2015	25 Aug 2015	1
Mapleton Bridge	22 Aug 2013	22 Aug 2013	1
Upstream Ashbourne Stw	18 Oct 2006	18 Oct 2006	1
Downstream Ashbourne Stw	18 Oct 2006	18 Oct 2006	1

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

2006–2015

Survey records by year

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

206

007

008

009

010

011

012

113

014

215

Fish measured by surveyors

Measured length distribution

See how the 63 measured fish were spread across different length ranges.

Smallest: 2.6 cm
Lower quarter: 4.8 cm
Median: 7 cm
Upper quarter: 7.8 cm
Largest: 9.6 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Bentley Brook

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

Brown / sea trout Grayling

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 →