Bullhead · Cottus gobio

Bullhead in the River Main Caerhayes

Largest measured bullhead: 7.2 cm

The largest bullhead measured in Environment Agency surveys of the River Main Caerhayes was 7.2 cm, recorded at Killbol on 11 May 2011.

Across 40 measured bullhead, the median measured length was 5 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 Caerhayes.

See bullhead records across England →

Most recent observation11 May 2011Killbol · 40 fish

Largest measured bullhead: 7.2 cm
Median length: 5 cm
Fish measured: 40
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
7.2 cm	11 May 2011	Killbol	126516
6.7 cm	11 May 2011	Killbol	126516
6.5 cm	11 May 2011	Killbol	126516
6.4 cm	11 May 2011	Killbol	126516
6.2 cm	11 May 2011	Killbol	126516
6.2 cm	11 May 2011	Killbol	126516
6.1 cm	11 May 2011	Killbol	126516
6.1 cm	11 May 2011	Killbol	126516
5.8 cm	11 May 2011	Killbol	126516
5.8 cm	11 May 2011	Killbol	126516

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
Killbol	5 Jun 1986	11 May 2011	2
Old Quarry	13 Jun 1986	13 Jun 1986	1
Tubbs Mill	5 Jun 1986	5 Jun 1986	1

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

1986–2011

Survey records by year

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

386

087

088

089

090

091

092

093

094

095

096

097

098

099

000

001

002

003

004

005

006

007

008

009

010

111

Fish measured by surveyors

Measured length distribution

See how the 40 measured fish were spread across different length ranges.

Smallest: 3.1 cm
Lower quarter: 4.4 cm
Median: 5.1 cm
Upper quarter: 5.8 cm
Largest: 7.2 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Caerhayes

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 →