Bullhead · Cottus gobio

Bullhead in the River Main Kenwyn

Largest measured bullhead: 7.9 cm

The largest bullhead measured in Environment Agency surveys of the River Main Kenwyn was 7.9 cm, recorded at Coose Bean on 23 June 2022.

Across 61 measured bullhead, the median measured length was 5.9 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 Kenwyn.

See bullhead records across England →

Most recent observation23 June 2022Coose Bean · 14 fish

Largest measured bullhead: 7.9 cm
Median length: 5.9 cm
Fish measured: 61
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
7.9 cm	23 Jun 2022	Coose Bean	161611
7.9 cm	11 Jun 2014	Penventinnie	141126
7.6 cm	23 Jun 2022	Penventinnie	161610
7.4 cm	11 Jun 2014	Penventinnie	141126
7.1 cm	11 Jun 2014	Penventinnie	141126
7.1 cm	11 Jun 2014	Penventinnie	141126
7.1 cm	10 Jun 2014	Coose Bean	141127
7 cm	23 Jun 2022	Coose Bean	161611
7 cm	23 Jun 2022	Coose Bean	161611
7 cm	11 Jun 2014	Penventinnie	141126

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
Penventinnie	7 Jul 1986	23 Jun 2022	3
Coose Bean	7 Jul 1986	23 Jun 2022	3
Treworder Wood	9 Jul 1986	9 Jul 1986	1

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

1986–2022

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

011

012

013

214

015

016

017

018

019

020

021

222

Fish measured by surveyors

Measured length distribution

See how the 61 measured fish were spread across different length ranges.

Smallest: 2 cm
Lower quarter: 5.2 cm
Median: 5.9 cm
Upper quarter: 6.6 cm
Largest: 7.9 cm

0–99 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Kenwyn

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 →