RiverFish

Bullhead · Cottus gobio

Bullhead in the River Wye

Largest measured bullhead: 8.9 cm

The largest bullhead measured in Environment Agency surveys of the River Wye was 8.9 cm, recorded at Wycombe Marsh Mill on 3 March 2004.

Across 6 measured bullhead, the median measured length was 7.7 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 Wye.

See bullhead records across England →

Most recent observation19 March 2026Wooburn Green
Largest measured bullhead
8.9 cm
Median length
7.7 cm
Fish measured
6
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
8.9 cm3 Mar 2004Wycombe Marsh Mill79457
8 cm3 Mar 2004Wycombe Marsh Mill79457
7.8 cm3 Mar 2004Wycombe Marsh Mill79457
7.6 cm3 Mar 2004Wycombe Marsh Mill79457
7.4 cm3 Mar 2004Wycombe Marsh Mill79457
6 cm3 Mar 2004Wycombe Marsh Mill79457

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
Wooburn Green9 Mar 200419 Mar 20262
Cores End19 Apr 201619 Mar 20262
Kingsmead Rec Ground11 Mar 200418 Mar 20262
Fryers road rec ground25 Mar 200418 Mar 20262
Wycombe Marsh Mill3 Mar 200417 Mar 20262
Upstream Desborough Park Road19 Feb 201317 Mar 20262
Boundary Park23 Sept 201019 Apr 20162
Downstream Pann Mill - The Rye25 Mar 200425 Mar 20041
Wooburn Green M409 Mar 20049 Mar 20041
Bourne End9 Mar 20049 Mar 20041

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

2004–2026

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 6 measured fish were spread across different length ranges.

Smallest
6 cm
Lower quarter
7.5 cm
Median
7.7 cm
Upper quarter
8 cm
Largest
8.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Wye

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

Brown / sea trout 3-spined stickleback Perch Roach

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 →