RiverFish

Bullhead · Cottus gobio

Bullhead in the River Main Molland Yeo

Largest measured bullhead: 7.9 cm

The largest bullhead measured in Environment Agency surveys of the River Main Molland Yeo was 7.9 cm, recorded at Yeo Mill (Sp) on 17 July 2018.

Across 180 measured bullhead, the median measured length was 5.1 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 Molland Yeo.

See bullhead records across England →

Most recent observation25 July 2025Westbridge Stables (Sp) · 17 fish
Largest measured bullhead
7.9 cm
Median length
5.1 cm
Fish measured
180
Survey locations
10

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
7.9 cm17 Jul 2018Yeo Mill (Sp)152912
7.9 cm12 Jul 2018Mornacott (Te)152907
7.1 cm23 Aug 2016Mornacott (Te)149085
6.9 cm18 Jul 2018Touts Bridge (Sp)152915
6.9 cm18 Jul 2018Touts Bridge (Sp)152915
6.9 cm12 Jul 2018Mornacott (Te)152907
6.8 cm23 Aug 2016Mornacott (Te)149085
6.7 cm18 Jul 2018Touts Bridge (Sp)152915
6.7 cm23 Aug 2016Mornacott (Te)149085
6.6 cm18 Jul 2018Bottreaux Mill (Sp)152913

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
Westbridge Stables (Sp)20 Aug 199625 Jul 20254
Touts Bridge (Sp)23 Aug 199625 Jul 20255
Yeo Mill (Sp)20 Aug 199623 Jul 20255
Bottreaux Mill (Sp)23 Aug 199623 Jul 20255
Mornacott (Te)20 Aug 199617 Jul 202516
Westbridge Stables (5 min)25 Sept 202325 Sept 20231
Grilstone (5 min)20 Aug 199619 Sept 20233
Reach Farm (5 min)16 Sept 202316 Sept 20231
Yeo Farm (5 min)16 Aug 202316 Aug 20231
Bish Mill (5 min)6 Aug 199616 Aug 20236

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

1996–2025

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 180 measured fish were spread across different length ranges.

Smallest
1.9 cm
Lower quarter
3.2 cm
Median
5.1 cm
Upper quarter
5.9 cm
Largest
7.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Main Molland Yeo

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

Brown / sea trout Atlantic salmon Stone loach Minnow 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 →