RiverFish

Bullhead · Cottus gobio

Bullhead in the River Yeo

Largest measured bullhead: 8.5 cm

The largest bullhead measured in Environment Agency surveys of the River Yeo was 8.5 cm, recorded at Gunstone Mill (Sp) on 27 July 2021.

Across 102 measured bullhead, the median measured length was 5.7 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 Yeo.

See bullhead records across England →

Most recent observation3 July 2025Downstream Golf Course Footbridge (Te) · 29 fish
Largest measured bullhead
8.5 cm
Median length
5.7 cm
Fish measured
102
Survey locations
7

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
8.5 cm27 Jul 2021Gunstone Mill (Sp)160635
7.5 cm27 Jul 2021Gunstone Mill (Sp)160635
7.5 cm27 Jul 2021Gunstone Mill (Sp)160635
7.5 cm27 Jun 2019Downstream Golf Course Footbridge (Te)154663
7.5 cm11 Aug 2017Downstream Golf Course Footbridge (Te)151363
7.4 cm27 Jul 2021Gunstone Mill (Sp)160635
7.4 cm27 Jul 2021Gunstone Mill (Sp)160635
7.4 cm11 Aug 2017Downstream Golf Course Footbridge (Te)151363
7.2 cm27 Jul 2021Gunstone Mill (Sp)160635
7.2 cm27 Jul 2021Gunstone Mill (Sp)160635

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
Downstream Golf Course Footbridge (Te)18 Sept 20123 Jul 20257
Mill Bridge (Sp/)5 Jun 19977 Jul 20235
Yeoford (Sp)24 May 20113 Jul 20232
Gunstone Mill (Sp)19 Jun 199727 Jun 20237
Downstream Salmon Hutch (Sp)19 Jun 199723 Jun 20235
Hittisleigh Mill (Sp/)12 Jun 19974 Jun 20134
Downes Mill (Te)*5 Jun 19972 Jun 20115

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

1997–2025

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 102 measured fish were spread across different length ranges.

Smallest
2.5 cm
Lower quarter
3.9 cm
Median
5.7 cm
Upper quarter
6.5 cm
Largest
8.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Yeo

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

Brown / sea trout 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 →