Bullhead · Cottus gobio

Bullhead in the Dalby/Thornton Beck

Largest measured bullhead: 10.7 cm

The largest bullhead measured in Environment Agency surveys of the Dalby/Thornton Beck was 10.7 cm, recorded at Thornton Beck Chester Villa caravan site on 23 September 2021.

Across 298 measured bullhead, the median measured length was 5.6 cm.

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

See bullhead records across England →

Most recent observation18 September 2024Dalby Beck, Low Staindale Car Park. DERBT27.

Largest measured bullhead: 10.7 cm
Median length: 5.6 cm
Fish measured: 298
Survey locations: 7

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
10.7 cm	23 Sept 2021	Thornton Beck Chester Villa caravan site	160510
10.5 cm	29 Aug 2012	Thornton Beck at Top Bridge Fm	133102
10.3 cm	23 Sept 2021	Thornton Beck at Top Bridge Fm	160428
10 cm	13 Oct 2021	Thornton Beck Ellerburn	160427
9.8 cm	13 Oct 2021	Thornton Beck Ellerburn	160427
9.4 cm	8 Aug 2011	Dalby Beck, Low Staindale Car Park. DERBT27.	129100
9.2 cm	1 Sept 2016	Dalby Beck, Low Staindale Car Park. DERBT27.	149129
9.2 cm	29 Aug 2012	Thornton Beck at Top Bridge Fm	133102
9.2 cm	29 Aug 2012	Thornton Beck at Top Bridge Fm	133102
8.9 cm	23 Sept 2021	Thornton Beck at Top Bridge Fm	160428

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
Thornton Beck at Top Bridge Fm	11 Sept 1997	18 Sept 2024	6
Dalby Beck, Low Staindale Car Park. DERBT27.	25 Sept 2001	18 Sept 2024	17
Thornton Beck Ellerburn	11 Sept 1997	14 Sept 2022	4
Thornton Beck Chester Villa caravan site	23 Sept 2021	14 Sept 2022	2
Dalby Beck, DS Dalby village	13 Oct 2021	13 Oct 2021	1
Thornton beck US STW bridge	23 Sept 2021	23 Sept 2021	1
Thornton Beck DS STW bridge	23 Sept 2021	23 Sept 2021	1

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

1997–2024

Survey records by year

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

297

098

099

000

101

102

103

104

005

206

107

108

009

110

111

212

113

114

015

116

017

218

019

020

721

422

023

224

Fish measured by surveyors

Measured length distribution

See how the 298 measured fish were spread across different length ranges.

Smallest: 1.4 cm
Lower quarter: 3.6 cm
Median: 5.6 cm
Upper quarter: 6.6 cm
Largest: 10.7 cm

0–99 mm

294

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Dalby/Thornton Beck

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

Brown / sea trout 3-spined stickleback 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 →