Bullhead · Cottus gobio

Bullhead in the River Main Seaton

Largest measured bullhead: 7.4 cm

The largest bullhead measured in Environment Agency surveys of the River Main Seaton was 7.4 cm, recorded at Courtney's Mill on 1 October 1997.

Across 135 measured bullhead, the median measured length was 4.7 cm.

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

See bullhead records across England →

Most recent observation9 September 2015Courtney's Mill · 33 fish

Largest measured bullhead: 7.4 cm
Median length: 4.7 cm
Fish measured: 135
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
7.4 cm	1 Oct 1997	Courtney's Mill	135641
7.3 cm	1 Oct 1997	Courtney's Mill	135641
7.3 cm	30 Sept 1997	Blackedon	135642
7.1 cm	9 Sept 2015	Courtney's Mill	146346
7.1 cm	9 Aug 2011	Courtney's Mill	127492
7.1 cm	1 Oct 1997	Courtney's Mill	135641
7 cm	1 Oct 1997	Courtney's Mill	135641
6.9 cm	1 Oct 1997	Courtney's Mill	135641
6.9 cm	30 Sept 1997	Blackedon	135642
6.8 cm	9 Sept 2015	Courtney's Mill	146346

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
Courtney's Mill	1 Oct 1997	9 Sept 2015	4
Lydcott	1 Oct 1985	2 Oct 1997	3
Blackedon	1 Oct 1985	30 Sept 1997	3

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

1985–2015

Survey records by year

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

285

086

087

088

089

090

091

092

293

094

095

096

397

098

099

000

001

002

003

004

105

006

007

008

009

010

111

012

013

014

115

Fish measured by surveyors

Measured length distribution

See how the 135 measured fish were spread across different length ranges.

Smallest: 1.6 cm
Lower quarter: 3 cm
Median: 4.7 cm
Upper quarter: 5.8 cm
Largest: 7.4 cm

0–99 mm

135

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Seaton

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

Brown / sea trout 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 →