RiverFish

Bullhead · Cottus gobio

Bullhead in the River Main Valency

Largest measured bullhead: 8.9 cm

The largest bullhead measured in Environment Agency surveys of the River Main Valency was 8.9 cm, recorded at Newmill on 24 August 2011.

Across 323 measured bullhead, the median measured length was 4.5 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 Valency.

See bullhead records across England →

Most recent observation30 August 2017Newmill · 169 fish
Largest measured bullhead
8.9 cm
Median length
4.5 cm
Fish measured
323
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.

LengthSurvey dateSurvey locationSurvey ID
8.9 cm24 Aug 2011Newmill127550
8.8 cm19 Jul 2012Newmill132621
8.5 cm19 Jul 2012Newmill132621
8.5 cm24 Aug 2011Newmill127550
8.5 cm10 Aug 2010Newmill123577
8.5 cm3 Aug 2009Boscastle118764
8.4 cm2 Aug 2012Halamaling132627
8.4 cm19 Jul 2012Newmill132621
8.4 cm24 Aug 2011Newmill127550
8.3 cm30 Aug 2017Newmill151662

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 surveyedFirst recordedLast recordedVisits finding bullhead
Newmill29 Sept 198730 Aug 20179
Halamaling4 Sept 20032 Aug 20125
Boscastle30 Sept 198719 Jul 20126

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

1987–2017

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 323 measured fish were spread across different length ranges.

Smallest
2.2 cm
Lower quarter
3.5 cm
Median
4.5 cm
Upper quarter
7.2 cm
Largest
8.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Valency

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

Brown / sea trout European eel Atlantic salmon Rainbow trout

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 →