RiverFish

Bullhead · Cottus gobio

Bullhead in the River Main Somerset Frome

Largest measured bullhead: 9.5 cm

The largest bullhead measured in Environment Agency surveys of the River Main Somerset Frome was 9.5 cm, recorded at Bull's Bridge on 26 July 2010.

Across 100 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 River Main Somerset Frome.

See bullhead records across England →

Most recent observation22 September 2025Tellisford (Te06)
Largest measured bullhead
9.5 cm
Median length
5.6 cm
Fish measured
100
Survey locations
11

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
9.5 cm26 Jul 2010Bull's Bridge123156
9.1 cm26 Jul 2010Bull's Bridge123156
8.8 cm26 Jul 2010Bull's Bridge123156
8.5 cm12 Jul 2010Iron Mill Farm (Se-03)122762
8.5 cm12 Jul 2010Iron Mill Farm (Se-03)122762
8.3 cm12 Jul 2010Iron Mill Farm (Se-03)122762
8.2 cm26 Jul 2010Bull's Bridge123156
8.1 cm19 Sept 2013Tellisford, Depleted Reach138774
8 cm19 Sept 2013Tellisford, Depleted Reach138774
7.6 cm19 Sept 2013Tellisford, Depleted Reach138774

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
Tellisford (Te06)3 Oct 200122 Sept 20258
Creamery (Te)4 Sept 200328 Aug 20197
Downstream Scutts Bridge (Te)27 Aug 200331 Jul 20197
Blatchbridge (Te)26 Aug 200324 Jul 20196
Snarlton Farm (Te)21 Aug 200323 Jul 20199
Vernal Lodge2 Aug 20172 Aug 20171
Oldford Farm10 Aug 201610 Aug 20161
Longhouse Farm10 Aug 201610 Aug 20161
Tellisford, Depleted Reach16 May 200619 Sept 20132
Bull's Bridge26 Jul 201026 Jul 20101
Iron Mill Farm (Se-03)4 Apr 200312 Jul 20102

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

2001–2025

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 100 measured fish were spread across different length ranges.

Smallest
2.7 cm
Lower quarter
4.4 cm
Median
5.6 cm
Upper quarter
6.6 cm
Largest
9.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Somerset Frome

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

Minnow Stone loach Roach 3-spined stickleback Chub Dace

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 →